How we can reduce traffic congestion(research.google)
research.google
How we can reduce traffic congestion
https://research.google/blog/the-power-of-collaboration-how-we-can-reduce-traffic-congestion/
185 comments
> here's a good graph
The trouble with this graph is that it assumes the buses/trains are full. It obviously doesn't apply to a bus with one passenger on it, which takes up even more space than a car.
From which we can observe the problem. Alice is at home and wants to go to work. She travels along a low density street for a few miles, enters a congested thoroughfare for a few more miles, then travels along another low density street to her destination.
She can't take a bus at the endpoints because she would be the only one on it, but if she took a bus only on the congested thoroughfare then she'd end up on the far side of it without a vehicle to get the rest of the way to her destination.
To fix this the thing you need before mass transit (by several years) is zoning rules that allow higher density construction in a higher percentage of the land area where people live.
The trouble with this graph is that it assumes the buses/trains are full. It obviously doesn't apply to a bus with one passenger on it, which takes up even more space than a car.
From which we can observe the problem. Alice is at home and wants to go to work. She travels along a low density street for a few miles, enters a congested thoroughfare for a few more miles, then travels along another low density street to her destination.
She can't take a bus at the endpoints because she would be the only one on it, but if she took a bus only on the congested thoroughfare then she'd end up on the far side of it without a vehicle to get the rest of the way to her destination.
To fix this the thing you need before mass transit (by several years) is zoning rules that allow higher density construction in a higher percentage of the land area where people live.
I think most people get that non-car forms of transport is denser. The two main issues that stop people using it are:
1) Time: Taking a trip involving public transport is slower than a car. This is fixable in urban areas with some dedicated paths, modal filters, and very frequent schedules and that kind of thing but this takes up front resources.
2) Safety: It's not safe. Too much antisocial behaviour on public transport. Nobody wants to sit near loud or smelly people. In the worst case people get assaulted. Cyclists are more likely to get seriously hurt in a crash or have their vehicle stolen than cars. It's fixable but policing takes effort.
3) The demand paradox: "See public transport and bikes are unpopular" say the decision makers and don't put in the resources. The thing is the infra needs to be near 100% built for people to want to use it. It's no good if your cycle commute is 80% dedicated bike paths but 20% of it is riding next to trucks and parked cars opening their doors as most people would rather take a car. It's also no good if the trains run every 30mins, so on average your trip is 15min delayed. The politician would think "why would I double it if the trains are already under-utilised" but does not understand latent demand.
1) Time: Taking a trip involving public transport is slower than a car. This is fixable in urban areas with some dedicated paths, modal filters, and very frequent schedules and that kind of thing but this takes up front resources.
2) Safety: It's not safe. Too much antisocial behaviour on public transport. Nobody wants to sit near loud or smelly people. In the worst case people get assaulted. Cyclists are more likely to get seriously hurt in a crash or have their vehicle stolen than cars. It's fixable but policing takes effort.
3) The demand paradox: "See public transport and bikes are unpopular" say the decision makers and don't put in the resources. The thing is the infra needs to be near 100% built for people to want to use it. It's no good if your cycle commute is 80% dedicated bike paths but 20% of it is riding next to trucks and parked cars opening their doors as most people would rather take a car. It's also no good if the trains run every 30mins, so on average your trip is 15min delayed. The politician would think "why would I double it if the trains are already under-utilised" but does not understand latent demand.
Also...allow people to work from home more. During the Covid pandemic, most white-collar employees work from home, and the commute and the traffic is usually not a big problem. But now more and more companies ask employees to go back to office, and traffic jam is becoming a headache again.
Yup... hours of commuting time just to sit in Zoom/Teams/Slack/whatever calls while in the office instead of at home makes no sense at all, and is bad for the environment (even if you use public transportation, not going to the office still emits less CO2 than going there). But because RTO is just a way of trying to get rid of employees without severance costs, these and other points will invariably fall on deaf ears...
Yes - when I read "both navigation users and non-users share the advantages of decongesting targeted segments", I wondered how long these advantages would last. It's widely accepted that less congestion will encourage people to travel by car more, which will soon eat up the gains (https://en.wikipedia.org/wiki/Induced_demand#Definitions)
> It's widely accepted that less congestion will encourage people to travel by car more, which will soon eat up the gains
This is not only not widely accepted but extremely misleading. The nature of "induced demand" is really that congestion suppresses demand. Which behaves in an entirely different way than the name implies.
If demand was being induced then all attempts to relieve congestion would be permanently impossible, which is nonsense. There are empirically places with little traffic congestion. Whereas if demand is being suppressed then an apparent capacity shortfall in the amount of 0.5X may really be a shortfall of X. Adding 0.5X then doesn't work, because congestion will remain until you add X, with the suppressed demand filling back in to the extent that you satisfy it.
So in order to relieve the congestion you have to add enough capacity to satisfy the demand that would exist in the absence of congestion, which is more than the amount that exists now, but not an infinite amount.
This is not only not widely accepted but extremely misleading. The nature of "induced demand" is really that congestion suppresses demand. Which behaves in an entirely different way than the name implies.
If demand was being induced then all attempts to relieve congestion would be permanently impossible, which is nonsense. There are empirically places with little traffic congestion. Whereas if demand is being suppressed then an apparent capacity shortfall in the amount of 0.5X may really be a shortfall of X. Adding 0.5X then doesn't work, because congestion will remain until you add X, with the suppressed demand filling back in to the extent that you satisfy it.
So in order to relieve the congestion you have to add enough capacity to satisfy the demand that would exist in the absence of congestion, which is more than the amount that exists now, but not an infinite amount.
We definitely need more metro, trams, bus routes, and bike paths. I especially want the latter because I bike to and from work every day. However, I have to wonder about the cost of these projects. In SF, we recently spent $346 million on the Van Ness Improvement Project, which added 2 miles of bus lanes. I just can't see how that's a good use of funds. If someone gave me $346 million and told me to improve society, I could think of many better options than adding two miles of bus lane. So a prerequisite to the whole idea seems to involve solving whatever is making these projects so expensive.
One of the problems indeed.
Though IMHO it's just lack of political will.
Highways are built at (relative) ease, no matter the cost. Data centers are infamously now being built at society expense (electricity and water capacity), sometimes literally in peoples backyards.
At the moment I don't have the receipts, but from anecdotes - it's all just political will.
There's a highway extension? Some properties are taken by eminent domain, some other NIMBYs are told to just suck it up.
Data center? Forget about it - foundations are being laid this moment (sometimes no matter the law)!
High speed rail? We must listen to every NIMBY on the proposed path, hence it will take 200 years to listen to all complaints and align opinions of the people impacted. Millions speant on "research, enviornmental impact and public opinion" - project stalls and is closed after 5 years.
NB: I am not from USA, I think this pattern fits many (especially western) countries. Successful projects (I repeat myself) are always based on political will, when rule/law framework is designed to make such projects easier and much cheaper.
NB2: Also as with anything - when you start building you get experience and expertese - the more you build the cheaper it gets. A lot of places havent built new train/metro/tram line in decades - hence all expertese must be built from scratch (from policies, to government clerks knowing how to deal with such projects, to construction businesses who never built rail in 50 years, etc.).
Though IMHO it's just lack of political will.
Highways are built at (relative) ease, no matter the cost. Data centers are infamously now being built at society expense (electricity and water capacity), sometimes literally in peoples backyards.
At the moment I don't have the receipts, but from anecdotes - it's all just political will.
There's a highway extension? Some properties are taken by eminent domain, some other NIMBYs are told to just suck it up.
Data center? Forget about it - foundations are being laid this moment (sometimes no matter the law)!
High speed rail? We must listen to every NIMBY on the proposed path, hence it will take 200 years to listen to all complaints and align opinions of the people impacted. Millions speant on "research, enviornmental impact and public opinion" - project stalls and is closed after 5 years.
NB: I am not from USA, I think this pattern fits many (especially western) countries. Successful projects (I repeat myself) are always based on political will, when rule/law framework is designed to make such projects easier and much cheaper.
NB2: Also as with anything - when you start building you get experience and expertese - the more you build the cheaper it gets. A lot of places havent built new train/metro/tram line in decades - hence all expertese must be built from scratch (from policies, to government clerks knowing how to deal with such projects, to construction businesses who never built rail in 50 years, etc.).
> However, I have to wonder about the cost of these projects.
A very good way to deal with this is to recognize that all infrastructure needs maintenance and periodic replacement. Once it is time to replace a road, that is when you change it to include bike paths, bus lanes and so on.
You need some foresight, planning, make new road designs part of law, and political will. Some countries have made this work very well.
A very good way to deal with this is to recognize that all infrastructure needs maintenance and periodic replacement. Once it is time to replace a road, that is when you change it to include bike paths, bus lanes and so on.
You need some foresight, planning, make new road designs part of law, and political will. Some countries have made this work very well.
Okay, how would you spend $346 million?
If we had to stick to transportation-specific improvements, I would use the money to eliminate bus fare for a year. (muni generates about $100M in fare, so really it would be enough money to eliminate fare for ~3 years.)
Unlike subway fare, bus fare doesn't prevent n'er-do-wells from getting on the bus (they just ignore the fare and get on anyway), and it probably increases ridership and gets some people out of their cars, which reduces congestion (public benefit and therefore deserving of government subsidy).
Unlike subway fare, bus fare doesn't prevent n'er-do-wells from getting on the bus (they just ignore the fare and get on anyway), and it probably increases ridership and gets some people out of their cars, which reduces congestion (public benefit and therefore deserving of government subsidy).
Where I live, I’d spend it on increasing parking availability at train stations, and/or run a lot more local buses that do a small (few kilometres) circuit around the station and ferry passengers to/from the station. Taking a bus to the station currently adds an unreasonable amount of time to the journey. It doesn’t matter how good trains are if I don’t live near a station and I can’t get there.
> For this study, the Google Maps algorithm was modified to prefer alternative routes with similar travel times and segment types, effectively guiding trips away from the pre-selected congested segments
> Over a six month period, we adopted a city-wide switchback (also known as crossover) experimental design, alternating between this treatment and the control (unaltered) routing algorithm over consecutive days to appropriately measure the effect of this intervention
> Averaged across cities, we observe a median increase of around 2% in driving speeds on targeted segments, corresponding to a median decrease of 0.5% to 1.0% in fuel consumption rates
The cities were: Atlanta, Boston, Chicago, Los Angeles, Miami, New York, Philadelphia, Salt Lake City, San Francisco, Seattle.
The data and code is also available (https://github.com/google-research/google-research/blob/mast...) from the paper (https://www.nature.com/articles/s44284-026-00443-x).
Kudos Google! Nice to see this kind of work. That said, let's just build more trains?
> Over a six month period, we adopted a city-wide switchback (also known as crossover) experimental design, alternating between this treatment and the control (unaltered) routing algorithm over consecutive days to appropriately measure the effect of this intervention
> Averaged across cities, we observe a median increase of around 2% in driving speeds on targeted segments, corresponding to a median decrease of 0.5% to 1.0% in fuel consumption rates
The cities were: Atlanta, Boston, Chicago, Los Angeles, Miami, New York, Philadelphia, Salt Lake City, San Francisco, Seattle.
The data and code is also available (https://github.com/google-research/google-research/blob/mast...) from the paper (https://www.nature.com/articles/s44284-026-00443-x).
Kudos Google! Nice to see this kind of work. That said, let's just build more trains?
I read the article and didn't see anywhere if they collaborated with city planners, or just ran this on their own. I get the techno-optimism of making traffic 'better' and also it may be concerning if trucks are being routed through neighborhoods where planners didn't build for it.
Do you think Google should get government sign-off on every change to its routing algorithm?
You're acting in bad faith attaching "every change" to what the parent said.
But this isn't that crazy? Most businesses require government approval for changes that have community effects... that's the entire point of government. Stuff like construction permits and regulation around structures, water usage, pollution, building architecture. Mining companies are required to assess environmental impacts. Companies making RF devices need to get confirmation on how the devices affect people and other devices.
And that's not even considering market share/monopoly status, which also regularly invites more scrutiny.
But this isn't that crazy? Most businesses require government approval for changes that have community effects... that's the entire point of government. Stuff like construction permits and regulation around structures, water usage, pollution, building architecture. Mining companies are required to assess environmental impacts. Companies making RF devices need to get confirmation on how the devices affect people and other devices.
And that's not even considering market share/monopoly status, which also regularly invites more scrutiny.
When the government proscribes discretionary permitting to those items you mentioned corruption and scarcity follow. It is exorbitantly expensive and difficult to build a house, a powerplant, or a mine in this country. For which we all currently pay for in cost of living.
Medical/psychological experiments involving human subjects are mandated by federal law to run through a review board. Did that happen here? This isn't a medical experiment, but I don't think its nuts to feel like maybe there should have been some oversight.
I fear you may overestimate the median benefit of government oversight.
Does this apply to Netflix, Amazon, Disneys, and many other streaming providers's "What to watch next? Recommended..." of sorts (or music/podcast streaming services)...
Routing traffic affects not only the drivers using Google Maps, but also everyone around them IN REALTIME.
Netflix personalized recommendations affect only the individual, not those around them who are not using Netflix.
Netflix personalized recommendations affect only the individual, not those around them who are not using Netflix.
This is only true for experiments funded by the government. In this case the experiment was funded solely by Google.
IRB approval is required for human subject research funded by private parties, too; not just government. But only really in the medical field.
>But only really in the medical field.
Looking it up, the exception where it is required is specifically for clinical investigations regulated by the Food and Drug Administration.
Looking it up, the exception where it is required is specifically for clinical investigations regulated by the Food and Drug Administration.
I think that's already very much a problem, and given that they constrained it to routes that didn't have a significantly different drive time the risk seems low.
City planners and zoning have been a disaster for US cities.
That's not what the parent is talking about. You're using the strawman of what appears to be occupancy zoning or something similar to argue that a techno fascists should have free reign to manipulate the mass movements of people within a city for their own purposes.
When a person driving a large commercial truck relies solely upon Google Maps for routing, they're already on the wrong course.
Google Maps doesn't have a "truck mode." It does not take things like size or weight or blanket restrictions on commercial truck traffic into account.
This means that Google Maps will cheerfully send commercial trucks down roads where they do not belong even on a normal day that is unfettered by whimsical techbro experiments, and the presence of such experiments on any other day doesn't change that.
Truck drivers do have a plethora of truck-centric navigation systems available to use, but Google Maps not amongst them. It never has been.
Google Maps doesn't have a "truck mode." It does not take things like size or weight or blanket restrictions on commercial truck traffic into account.
This means that Google Maps will cheerfully send commercial trucks down roads where they do not belong even on a normal day that is unfettered by whimsical techbro experiments, and the presence of such experiments on any other day doesn't change that.
Truck drivers do have a plethora of truck-centric navigation systems available to use, but Google Maps not amongst them. It never has been.
Found the European :)
The south SF Bay Area cities of Los Gatos and Monte Sereno have persistent problems with traffic gridlock during summer weekends and holidays due to navigation apps routing drivers off of southbound SR-17 and onto surface streets. It gets so bad that residents literally can't get out of their own driveways and emergency response vehicles can't move.
There actually did used to be train service from San Jose to Santa Cruz but it was abandoned in 1940 due to high costs and lack of use. Rebuilding it would cost >$1B.
https://www.goodtimes.sc/isnt-train-san-jose/
There actually did used to be train service from San Jose to Santa Cruz but it was abandoned in 1940 due to high costs and lack of use. Rebuilding it would cost >$1B.
https://www.goodtimes.sc/isnt-train-san-jose/
It can’t be helped. Roads are not only locally funded and the only thing allowing residents to free-ride on everyone else’s contribution to this commons is the information asymmetry. It’s similar to the fact that San Franciscans and Athertonians have “slow streets / no through streets” which allow a few to retain exclusive road use for themselves.
With increased information comes more efficient utilization and no doubt the free-riders will find that troubling since it’s no longer a free ride with the asymmetric effect where they can use my roads but I can’t use theirs.
In an ideal world, we would use our Fastraks to charge for marginal road use and a locality can recoup capital investments it made by charging appropriately for marginal use.
With increased information comes more efficient utilization and no doubt the free-riders will find that troubling since it’s no longer a free ride with the asymmetric effect where they can use my roads but I can’t use theirs.
In an ideal world, we would use our Fastraks to charge for marginal road use and a locality can recoup capital investments it made by charging appropriately for marginal use.
Do you not have shoulder lanes? I ask because I’ve lived places that don’t and I’ve always wondered if you just die if EMS doesn’t have a lane to get to you.
> let's just build more trains?
"just" is doing a lot of work there. Trains are a very (very) expensive way to move people between pre-determined places. We can do a lot better than this in 2026.
"just" is doing a lot of work there. Trains are a very (very) expensive way to move people between pre-determined places. We can do a lot better than this in 2026.
Any examples?
Surely the top way to avoid traffic congestion would be communities where it's possible to live near where you work, shop, go out, etc. and not doing everything else exactly the same but taking a slightly different highway in your car
This is possible if you’re not picky about where you live, where you work, your career options, how crowded your local vicinity is, or how much you pay for your residence.
The more your preferences or financial constraints come into play, the more you have to give up.
Most people settle in for driving because it allows them to pick from more job options than those that happen to be located near their house and more housing options than what happens to be near your job.
This didn’t matter as much 200 years ago when most people’s job options were limited to farming or something in service of farming.
It got much harder when the range of people’s jobs exploded and finding a company hiring in your specialty meant traveling some distance from home.
It gets even harder when there are two earners in a household trying to find two jobs.
The more your preferences or financial constraints come into play, the more you have to give up.
Most people settle in for driving because it allows them to pick from more job options than those that happen to be located near their house and more housing options than what happens to be near your job.
This didn’t matter as much 200 years ago when most people’s job options were limited to farming or something in service of farming.
It got much harder when the range of people’s jobs exploded and finding a company hiring in your specialty meant traveling some distance from home.
It gets even harder when there are two earners in a household trying to find two jobs.
This is like, a post-hoc rationalization.
Most jobs, not all, can take place inside a city. If you build your cities densely, people can live and work within the city and have all their needs met without the need for a car (see: the great cities of the world)
If you design economic hubs properly, businesses can be located within reach of homes without the need for cars.
If you instead prioritize the need for, I don’t know, a monoculture lawn and separation from lower class people, then you’re choosing to build suburbs. Once a city has built enough suburbs, businesses become out of reach without the use of a car.
Most jobs, not all, can take place inside a city. If you build your cities densely, people can live and work within the city and have all their needs met without the need for a car (see: the great cities of the world)
If you design economic hubs properly, businesses can be located within reach of homes without the need for cars.
If you instead prioritize the need for, I don’t know, a monoculture lawn and separation from lower class people, then you’re choosing to build suburbs. Once a city has built enough suburbs, businesses become out of reach without the use of a car.
Since I've moved to my current home, I've had jobs in about 6 different towns and cities. I think for all of them I had colleagues that cycled to work and colleagues that drove for an hour or more.
All these jobs had homes and shops within walking distance. But they are not within walking distance of each other.
All these jobs had homes and shops within walking distance. But they are not within walking distance of each other.
> This is possible if you’re not picky about where you live, where you work, your career options,
Yup.
And even if you arent't picky. The amount of surface area you can cover scales quadratically with the distance you can commute (either by traveling longer, or by going faster). So as a first approximation, the amount of competition for your labour also goes up quadratically.
Job-hopping is one of the best ways to get better jobs. And it is a LOT easier if you can commute further.
Yup.
And even if you arent't picky. The amount of surface area you can cover scales quadratically with the distance you can commute (either by traveling longer, or by going faster). So as a first approximation, the amount of competition for your labour also goes up quadratically.
Job-hopping is one of the best ways to get better jobs. And it is a LOT easier if you can commute further.
The explosion was also due to the car not only spreading low density housing out that would have been a tough sell previously, but also job sprawl to suburban and exurban greenfield.
There used to be natural agglomeration to central well connected nodes before the car. Many cities enacted height limits in the early 1900s with the specific aim to spread out development that was dense enough to make serving basic infrastructure, such as water, power, transit, and cleaning the mounting horseshit off the roads, increasingly expensive and difficult. Early real estate barons would buy marginal land and develop a streetcar line that ran into the job center, and sell plots off that line now that it finally had some utility in the form of a connection to jobs. Even if you worked in something specialized back then, chances are it was close to where most other people were working. Offices were downtown. Government buildings were downtown. Hospitals were downtown. Manufacturing was downtown. Ports and railheads were downtown. All of that snowballing enjoyed by cities exploded with the car.
There used to be natural agglomeration to central well connected nodes before the car. Many cities enacted height limits in the early 1900s with the specific aim to spread out development that was dense enough to make serving basic infrastructure, such as water, power, transit, and cleaning the mounting horseshit off the roads, increasingly expensive and difficult. Early real estate barons would buy marginal land and develop a streetcar line that ran into the job center, and sell plots off that line now that it finally had some utility in the form of a connection to jobs. Even if you worked in something specialized back then, chances are it was close to where most other people were working. Offices were downtown. Government buildings were downtown. Hospitals were downtown. Manufacturing was downtown. Ports and railheads were downtown. All of that snowballing enjoyed by cities exploded with the car.
The relative price of those cramped urban centers where this is true suggests that at least a few more people would choose this path if it were cheaper.
Here is your easy solution:
Per employee tax = $0.20 * commute_miles * 2 * (commute_miles / 10)^2 * mandated_office_days_per_year * (1 + 2 * share_of_workforce_over_10_miles)^2
Tech companies can have more distributed offices and assign employees based on geography instead of teams, go back to WFH, pay employees enough to live close to their mega campuses, or pay out the ass into adding more lanes.
Per employee tax = $0.20 * commute_miles * 2 * (commute_miles / 10)^2 * mandated_office_days_per_year * (1 + 2 * share_of_workforce_over_10_miles)^2
Tech companies can have more distributed offices and assign employees based on geography instead of teams, go back to WFH, pay employees enough to live close to their mega campuses, or pay out the ass into adding more lanes.
And the easiest way to do this is to lift restrictions on being able to build housing near workplaces (i.e. anywhere housing might reasonably and gainfully be built). Most traffic is caused by building restrictions.
B-b-bb-b-bbb-but then how will I have my 3 storey house with a 100 acre backyard, 2 pools, and 14 cars??? Don't you know it's LITERALLY IMPOSSIBLE to live without these basics?? What are you, a communist or something??????
That seems like an impossible task in today’s world of layoffs and needing to jump jobs to get pay raises.
You could live where you work and suddenly your next job is a 30 min drive away.
How could you ensure that enough companies existing within a 10 mile radius to provided varied employment to all the residents?
You could live where you work and suddenly your next job is a 30 min drive away.
How could you ensure that enough companies existing within a 10 mile radius to provided varied employment to all the residents?
If you don't have a community like that, then the best way is congestion pricing.
The best way is to change our communities, even if that takes time and money.
It is difficult for me to admit I'm an idiot but when I was younger and living in an apartment, I loved the idea of a single family home. And now that I'm living in a single family home, I feel like I was wrong all along. Not that I want to go back to the apartment I was in before. Dear lord no but the idea of a mixed use building not too tall only like first floor with high ceilings for business or shops with two or at the most three floors above for residential units feels like the ideal sweet spot. Ideally with a lot of these close together to have everything I need within a walking distance but also a subway station within a walking distance if I need to go farther.
I wasted a decade trying to live in single family homes. Now at 40 my wife and I are living in a small city in a condo and couldn't be happier. Neither of us enjoyed the workload of managing a SFH. Dont force yourself to stay if you aren't happy, you'll wish you moved sooner (I do).
Do you have kids? I feel like apartment living as a family is worse than a spacious single family home and yard and all that. I suspect that preference holds true for most people.
Most kids are only into playing in the yard for a couple years really. Before long they are preteens living in their room, probably seething at the fact they need a ride from a parent to hang out with any of their friends.
Apartments can also have stuff you could never afford that a kid would like, such as a massive pool (try pricing out a new build pool these days).
Apartments can also have stuff you could never afford that a kid would like, such as a massive pool (try pricing out a new build pool these days).
Community shared parks can serve the purpose that a SFH yard serves for kids, but you have to interact with other people and we can't have that.
There is little hope for that as long as driving is heavily subsidized.
How is driving subsidized?
Massive ongoing investment into roads. EV incentives that would pay for 3-4 ebikes outright. Big 3 bailout. Cash for clunkers. Impact fees from developers towards roads. As others said parking requirements. There is so much beyond that too.
By providing free or cheap parking for people that don't live there. Urban land is extremely expensive and parking generally doesn't cost what it should, other land uses would provide a lot more revenue. Parking in US cities is greatly over provisioned to make life easy for suburbanites, destroying urban fabric.
One example is the requirement to have parking spaces.
Like everything else community construction responds to incentives. So we need to structurally incentivise short distance commute communities. Congestion pricing seems like a reasonable first step.
What if you don't want to live in a dense community?
Well just live somewhere that is so lacking in density there is no congestion.
Or a small town that is surrounded by farms.
Just avoid suburban housing as far as the eye can see with a limited number of roads everyone gets funneled on to.
Or a small town that is surrounded by farms.
Just avoid suburban housing as far as the eye can see with a limited number of roads everyone gets funneled on to.
I’ve done that and those areas change over time. A town becomes more like a small city. A small city becomes more dense. Etc. Then all the urbanists move the goal posts and ask why you didn’t live somewhere else.
Then lucky you, most of America already caters to exactly what you want. You just have to understand that the desire to not live in a dense community is what causes traffic. You can’t have spread-out housing for most people, and low traffic.
If you want low-density housing and low traffic for yourself, the best thing you can do to make that happen is support and encourage high-density housing and mass transit for as many _other people_ as possible.
If you want low-density housing and low traffic for yourself, the best thing you can do to make that happen is support and encourage high-density housing and mass transit for as many _other people_ as possible.
Then you don't. But don't expect people who live in urban centers to cater to your needs when you don't live there.
In that case antifa will force to commit seppuku. You will have no other choice. Freedom isn't free.
This sounds simple, but many people are already living further away because they can’t afford to live downtown near where they work. Add kids into the equation, and many people who could live there without them are also forced out.
Congestion pricing is a regressive tax.
Congestion pricing is a regressive tax.
The most regressive tax imaginable is a flat fee for every person with no consideration of income. That is exactly the effect of requiring everyone to own a car.
It isn’t a flat fee per se, if only because wealthier people are too prideful. Rich man buys a 100k mercedes. Poor man buys that mercedes 15 or 20 years later for 3k. It still does what it did when it cost 100k.
>Surely the top way to avoid traffic congestion would be communities where it's possible to live near where you work, shop, go out, etc. and not doing everything else exactly the same but taking a slightly different highway in your car
I dont even know what this would look like in practice. It feels like an inner city thing, lifestyle priced accordingly.
What Socialists/Communists/Liberals/Conservatives/Local and State Governments/Weird Internet Tech Bros all seem to forget is that people have different priorities, and you cant build 1 house that suits every priority.
I am house hunting at the moment, and houses optimised for walking to shops are at the low end, when what I need is a big yard for my kid to run around in and a shed for my blacksmithing tools (and ideally neighbors far enough away that they dont mind metal being banged on in the morning) while also being within reasonable driving distance of a few of the sites I work at.
I dont even know what this would look like in practice. It feels like an inner city thing, lifestyle priced accordingly.
What Socialists/Communists/Liberals/Conservatives/Local and State Governments/Weird Internet Tech Bros all seem to forget is that people have different priorities, and you cant build 1 house that suits every priority.
I am house hunting at the moment, and houses optimised for walking to shops are at the low end, when what I need is a big yard for my kid to run around in and a shed for my blacksmithing tools (and ideally neighbors far enough away that they dont mind metal being banged on in the morning) while also being within reasonable driving distance of a few of the sites I work at.
One of the things this type of intervention doesn't take into account is that different roads are built with different levels of hardiness based on the amount of traffic they are expected to receive.
For instance, a few years ago, a segment of I-495 in Delaware needed to be unexpectedly shut down for emergency repairs. Drivers were rerouted. But because of the increase in traffic on the less-hardy detour route, that route needed repairs and repaving soon afterward, much more quickly than it would have ordinarily required.
So yes, drivers can be better dispersed to ease congestion, but we also need to consider the secondary effects to the roadways themselves.
For instance, a few years ago, a segment of I-495 in Delaware needed to be unexpectedly shut down for emergency repairs. Drivers were rerouted. But because of the increase in traffic on the less-hardy detour route, that route needed repairs and repaving soon afterward, much more quickly than it would have ordinarily required.
So yes, drivers can be better dispersed to ease congestion, but we also need to consider the secondary effects to the roadways themselves.
A random factoid that will always stick in my brain is that the damage a vehicle does to a road is proportional to the weight on an axel...to the fourth power. I suspect rerouting semis to the roadway is by far the greatest factor.
Another random fact is that Norman Mailer coined ‘factoid’ to refer to a fabrication presented as fact, but now means the opposite (as in, a fact presented as a fact, not a fact presented as fabrication).
So it’s now one of those words like ‘literally’ which can be its own antonym.
So it’s now one of those words like ‘literally’ which can be its own antonym.
My pet peeve is people claiming "literally" is now being used to mean the opposite. It is never used that way. When people use "literally" in the weakened and figurative way, they are not using it to mean "figuratively". They are using it to mean "very much".
It is often used that way, at least in Britain, e.g. "I'm literally dying" to indicate something being very funny
One factoid about Norman Mailer: he stabbed his wife.
People just want to get to their next destination faster.
Long story short: More public transport sounds like a good idea to prevent more situations like you posted.
Long story short: More public transport sounds like a good idea to prevent more situations like you posted.
The same things keeps happening every time I find myself stuck in traffic on the interstate. Out of nowhere, a popup appears in Google Maps: a faster route is available! 4 minutes faster! Unless either the passenger or the driver are fast enough to hit "No thanks", the change auto-applies, and Google now wants me to exit the interstate at the nearest exit and drive some random road I had no idea about, to rejoin the interstate a few miles ahead. Of course, a bunch of other vehicles in the same traffic jam got the same
notification, so that minor road now get a sizable fraction of the interstate traffic, all of which then struggles to merge back.
Seeing this again and again. We call it a "Google detour" in the family, and rarely agree to the change of the route.
Seeing this again and again. We call it a "Google detour" in the family, and rarely agree to the change of the route.
Same. This is why I switched to Apple Maps. Sometimes the Google detours would end in dangerous situations, like a left turn with no light across a major road. And it would be to save 2 minutes-ridiculous!
Apple Maps does this too but the threshold seems to be higher - it's a lot less willing to do it.
I've had Google try to route me across private property (an apartment complex parking lot) to avoid a signaled intersection and save a couple of minutes.
I’ve just started taking surface roads out of Charlotte at peak hours because I know how to get around, and any route that’s part of Apple/Google maps defaults will invariably be clogged with everyone following their directions. Surface streets tend to be blissfully open these days.
So many god damn unprotected left turns on mapping software. Some of them illegal too like asking you to do it when a sign says no left turns during listed hours.
Now they did the obvious thing and load balanced the alternative routes. Somebody could have done this long ago and got a promo.
Me too. It’s infuriating and unsafe. I don’t drive often, but when I do it’s out of the city where I’m unfamiliar and need a map.
So I also stopped using Google Maps for driving.
Who at Google seriously believes that it’s good idea to 1) unpredictably change the route someone chose mid-drive, and 2) to distract them while driving with a pop up notification that must be interacted with just to maintain the route.
If I choose a route, I chose it for a reason. Don’t change it while I’m driving.
So I also stopped using Google Maps for driving.
Who at Google seriously believes that it’s good idea to 1) unpredictably change the route someone chose mid-drive, and 2) to distract them while driving with a pop up notification that must be interacted with just to maintain the route.
If I choose a route, I chose it for a reason. Don’t change it while I’m driving.
Congestion can be solved by charging more for driving. Even a modest amount would start affecting how much people drive. The money could be used for better roads and improving other transit options that aren't so space-inefficient. That said, this would likely be unpopular to implement until the effects were visible. See congestion pricing in NYC as an example.
Won't that just unfairly displace the impact onto the economically disadvanteged as they are the least likely to have the flexibility in their schedule, inadvertently forcing more of the maintenance burden onto those who are int be least place to bear it?
You wouldn't just charge more for driving. You do it in combination with funding public transport, building safer cycling routes, and removing roadblocks from building cheap housing near PT hubs.
Take the revenue generated from congestion pricing, and put it into public transportation. Make public transportation free to use. That would be far more impactful to the folks least able to bear an increase in driving fees.
In most of the US, people are forced to own cars because they don't have public transit available, or the available public transit is too infrequent, or there aren't dense enough routes. The reason behind this is funding.
Additionally, buses are less efficient because they need to sit in the same traffic as everyone else. Reduced traffic makes buses more efficient. Reducing car traffic is a win for basically everyone, and increasing public transit is additionally a win for basically everyone.
Car infrastructure is heavily subsidized, and congestion pricing is one way to make car owners pay for part of the cost. Why is it fair for public transit riders to have to pay per ride, when car owners get to use the infrastructure for free?
In most of the US, people are forced to own cars because they don't have public transit available, or the available public transit is too infrequent, or there aren't dense enough routes. The reason behind this is funding.
Additionally, buses are less efficient because they need to sit in the same traffic as everyone else. Reduced traffic makes buses more efficient. Reducing car traffic is a win for basically everyone, and increasing public transit is additionally a win for basically everyone.
Car infrastructure is heavily subsidized, and congestion pricing is one way to make car owners pay for part of the cost. Why is it fair for public transit riders to have to pay per ride, when car owners get to use the infrastructure for free?
> Why is it fair for public transit riders to have to pay per ride
In my city public transit fares only cover something like 10% of the cost. Isn’t that fairly typical?
> car owners get to use the infrastructure for free
Every place I’ve lived charges a fuel tax to pay for roads.
In my city public transit fares only cover something like 10% of the cost. Isn’t that fairly typical?
> car owners get to use the infrastructure for free
Every place I’ve lived charges a fuel tax to pay for roads.
> In my city public transit fares only cover something like 10% of the cost. Isn’t that fairly typical?
Quite a few areas have their public transit fully funded by users and some even make a substantial profit. (https://en.wikipedia.org/wiki/Farebox_recovery_ratio)
The US obviously loses out to places like Japan because you have the chicken and egg problem: to make money back you need enough people but for enough people to use public transport you need to invest in it.
> Every place I’ve lived charges a fuel tax to pay for roads.
Which, ironically, often only covers something like 10% of the cost :)
Quite a few areas have their public transit fully funded by users and some even make a substantial profit. (https://en.wikipedia.org/wiki/Farebox_recovery_ratio)
The US obviously loses out to places like Japan because you have the chicken and egg problem: to make money back you need enough people but for enough people to use public transport you need to invest in it.
> Every place I’ve lived charges a fuel tax to pay for roads.
Which, ironically, often only covers something like 10% of the cost :)
Fuel tax doesn’t often cover everything. LA metro actually spends an appreciable fraction of its budget on highway and road expansion for example.
> In my city public transit fares only cover something like 10% of the cost. Isn’t that fairly typical?
Sure, but the budget for transit is also extremely tight, especially compared to car infrastructure.
If only 10% of the costs are covered, that's even more motivation to not charge fees at all, right? Why impose that burden? More people riding public transit means less cars on the road, and less traffic, which is good for everyone.
> charges a fuel tax to pay for roads
For the most part fuel taxes haven't increased to cover the costs of roads (it hasn't increased with inflation at all, federally), and they typically cover highways. Recently, a number of places have been looking at pausing or removing fuel taxes to reduce costs of fuel, due to the Iran war. Most states cover the cost of roads primarily through their general funds.
Sure, but the budget for transit is also extremely tight, especially compared to car infrastructure.
If only 10% of the costs are covered, that's even more motivation to not charge fees at all, right? Why impose that burden? More people riding public transit means less cars on the road, and less traffic, which is good for everyone.
> charges a fuel tax to pay for roads
For the most part fuel taxes haven't increased to cover the costs of roads (it hasn't increased with inflation at all, federally), and they typically cover highways. Recently, a number of places have been looking at pausing or removing fuel taxes to reduce costs of fuel, due to the Iran war. Most states cover the cost of roads primarily through their general funds.
Isn't there a problem with rerouting that you push cars into community-roads that aren't supposed to be supporting commuting traffic?
Wasn't there some articles a few years ago about communities that filled wheelbarrows with phones connected to Waze and moved them slowly down the road, stop waze from routing cars through residential areas?
Wasn't there some articles a few years ago about communities that filled wheelbarrows with phones connected to Waze and moved them slowly down the road, stop waze from routing cars through residential areas?
The problem with cars isn't routing, its geometry. Cars cant be fixed. Build more trains and trams and busses and bike lanes already.
Traffic apps only know about congestion if someone running the app goes down the congested road. Because of this, I've always suspected that the apps, from time to time, will route someone down a route they haven't gathered data on in a while, just to collect the data, and even if the route is likely to be suboptimal.
>I've always suspected that the apps, from time to time, will route someone down a route they haven't gathered data on in a while, just to collect the data, and even if the route is likely to be suboptimal.
I can't say this actually happened for me. For straightforward routes with no congestion I never saw random alternate routes being proposed. That makes sense, given that it'd probably tip people off. If this is happening, they must only be doing in cases where there's congestion and the difference is marginal, eg. it's rush hour and the "optimal" route takes 30 minutes but the alternate takes 33 minutes. Moreover you don't really need any deliberate effort to see this effect. If nobody is traveling on a side road, the algorithm will probably revert to historical patterns, which might turn out to be overly optimistic in congestion scenarios (eg. there's nearby road repairs and other people are already using it as an alternate), thereby giving you the impression that you got screwed over by the app.
I can't say this actually happened for me. For straightforward routes with no congestion I never saw random alternate routes being proposed. That makes sense, given that it'd probably tip people off. If this is happening, they must only be doing in cases where there's congestion and the difference is marginal, eg. it's rush hour and the "optimal" route takes 30 minutes but the alternate takes 33 minutes. Moreover you don't really need any deliberate effort to see this effect. If nobody is traveling on a side road, the algorithm will probably revert to historical patterns, which might turn out to be overly optimistic in congestion scenarios (eg. there's nearby road repairs and other people are already using it as an alternate), thereby giving you the impression that you got screwed over by the app.
> running the app
At least for Apple, iPhones always report this data, not just when using Apple Maps
At least for Apple, iPhones always report this data, not just when using Apple Maps
Doesn't have to be true. My state has public camera feeds for various highway stretches. Too low-detail to identify vehicles but easily enough to detect congestion.
I wonder this same thing when I’ve been routed completely asinine ways off interstates at night when traffic appears calm. I always have to play the game of “is there horrendous traffic ahead from night paving / accident, or am I being conscripted as a traffic sensor robot?”
[deleted]
Government data sources can input real time data into Google Maps [1]. So, it's more likely than not that local police or state DoT is behind that.
[1] https://contentpartners.maps.google.com/
[1] https://contentpartners.maps.google.com/
This would sort of happen naturally if they routed as if roads with no data in the past N minutes/hours were at full speed.
"Hence, the efficient use of transportation networks is of paramount importance."
Perhaps some sort of carpooling profile? That would be a dramatically bigger improvement than, say, routing users through residential neighborhoods.
Perhaps some sort of carpooling profile? That would be a dramatically bigger improvement than, say, routing users through residential neighborhoods.
How would Google help with a carpooling profile?
They are looking at ways they can improve traffic that are actually in their control. They can change how they route traffic that is using their app, they can’t change public policy or driving choices. They are working with what they have.
They are looking at ways they can improve traffic that are actually in their control. They can change how they route traffic that is using their app, they can’t change public policy or driving choices. They are working with what they have.
Much as they have features for walk / bike / transit traffic, they could suggest step-by-step carpool instructions:
"1. meet with (other Google Map carpool user) X at location Y.
2. In one car, both of you drive to location Z."
Obviously, huge challenges here (is person X a serial killer, etc.) But Google can handle moonshots.
Obviously, huge challenges here (is person X a serial killer, etc.) But Google can handle moonshots.
> Obviously, huge challenges here
Social credit score? I've seen that Black Mirror episode.
Social credit score? I've seen that Black Mirror episode.
Is this the comment for me to snarkily reinvent trains and trams and buses on?
All attempts to reimagine transport are train but worse, except for the occasional bike but worse.
Every now and then, an especially inventive inventor manages to do both at once. And that's how you get the Shweeb.
https://youtube.com/watch?v=7qNOtgrIjO4
Every now and then, an especially inventive inventor manages to do both at once. And that's how you get the Shweeb.
https://youtube.com/watch?v=7qNOtgrIjO4
So basically sending some people on worse routes for the sake of the “greater good”? I long suspected they did this and is not what I want. I don’t want to be forced to a worse outcome for myself just for the sake of the “greater good”. Taken to its logical extreme, lots of evil had been propagated because of the “greater good”.
I've noticed that Google Maps has started sucking a lot lately, routing us onto routes that take 2-4 minutes longer when a faster route is clearly available or taking us on nonsensical detours, and I wonder if this experiment is a reason why.
There's a hidden cost to this, and that's trust in the mapping app. I've stopped using Google Navigation for routine trips where I know how to get to the destination. It used to be worth it for the traffic information, but now that there's a good chance that it'll take you on a slower route for reasons that may be beneficial to Google but detrimental to you, it's not worth it. My brother-in-law switched to Apple Maps for similar reasons: he's finding it simply gives better results nowadays.
There's a hidden cost to this, and that's trust in the mapping app. I've stopped using Google Navigation for routine trips where I know how to get to the destination. It used to be worth it for the traffic information, but now that there's a good chance that it'll take you on a slower route for reasons that may be beneficial to Google but detrimental to you, it's not worth it. My brother-in-law switched to Apple Maps for similar reasons: he's finding it simply gives better results nowadays.
I've noticed this too. It has gotten more frequent over last year or so. It will route me to narrow roads which I know for a fact will take me much longer.
I had the worst experience about 3 weeks ago, when I kept driving on very narrow and congested roads for almost 3 hours and the destination was showing still an hour away. If I had just taken the normal route, it would've taken me only 2 hours total. But Google thought let's make this guy drive around for 4 hours because fuck him.
I had the worst experience about 3 weeks ago, when I kept driving on very narrow and congested roads for almost 3 hours and the destination was showing still an hour away. If I had just taken the normal route, it would've taken me only 2 hours total. But Google thought let's make this guy drive around for 4 hours because fuck him.
Absolutely this. To the extent I would be surprised if the effect they describe here measures what they think it does. Any ground-level effect from altering route recommendations is mediated by drivers’ willingness to comply.
People go along with your wacky reroutes because you’ve conditioned them to believe you’re saving them—individually, not collectively—time. The moment people believe you’re giving them the runaround to save everybody else a few seconds, I feel quite sure you’ll see compliance disappear. Your intervention loses its relationship to your outcome.
At which point the second-order effect leaves you worse off than the status quo: once you’ve shattered the trust, people don’t believe you even when you truly are routing them around a traffic jam to save them (individually) time. At which point you lose the collective benefits that were a happy side effect of drivers having better information to use in their own self-interest.
People go along with your wacky reroutes because you’ve conditioned them to believe you’re saving them—individually, not collectively—time. The moment people believe you’re giving them the runaround to save everybody else a few seconds, I feel quite sure you’ll see compliance disappear. Your intervention loses its relationship to your outcome.
At which point the second-order effect leaves you worse off than the status quo: once you’ve shattered the trust, people don’t believe you even when you truly are routing them around a traffic jam to save them (individually) time. At which point you lose the collective benefits that were a happy side effect of drivers having better information to use in their own self-interest.
It's actually shocking they didn't do this before? Load balancing across multiple similar paths seems to be one of the first thing you would add once you hit some scale?
I love how they congratulate themselves on that article (Google being Google, they still think they are the smartest people in the room). But I'm waiting to see the second or third unknown order effects.
I love how they congratulate themselves on that article (Google being Google, they still think they are the smartest people in the room). But I'm waiting to see the second or third unknown order effects.
>During “treatment” days, the modified routing guided all trips that encountered the pre-selected congested segments toward alternative routes with similar travel times.
Why would they specifically need to route people away from congested segments? Presumably if a segment gets congested enough, it'd be considered slower and therefore won't get picked in the first place?
Why would they specifically need to route people away from congested segments? Presumably if a segment gets congested enough, it'd be considered slower and therefore won't get picked in the first place?
Probably many reasons but here’s one demo: https://en.wikipedia.org/wiki/Braess%27s_paradox
Every actor acting rationally in their own interest can get to a worse equilibrium than if they were coordinated(in this case, to completely ignore the new edge). There are many other examples of this in game theory, you should look it up.
Every actor acting rationally in their own interest can get to a worse equilibrium than if they were coordinated(in this case, to completely ignore the new edge). There are many other examples of this in game theory, you should look it up.
Because those roads are still maybe 30 seconds or 60 seconds faster on paper and critically they're the major roads with minimal intersections, which all apps prefer.
Another question: they say road speeds increased, great. But that’s a different metric than average drive time. Curious if that also decreased.
So much money spent to avoid the easiest answer: less cars (more public transport, more bicycle lanes, etc.)
If we could copy the traffic laws of a country like Germany to the US, I think that would have the biggest + cheapest effect. I am OK with automated/elevated enforcement if it means stop & go traffic evaporates into free flowing conditions.
We should also take the idea from Finland where the traffic fines scale with each person's ability to pay. $100 for camping the passing lane or failing to maintain a reasonable following distance is not a big consequence for a lot of people. $100k covers the edges a lot better.
https://www.theguardian.com/world/2023/jun/06/finnish-busine...
We should also take the idea from Finland where the traffic fines scale with each person's ability to pay. $100 for camping the passing lane or failing to maintain a reasonable following distance is not a big consequence for a lot of people. $100k covers the edges a lot better.
https://www.theguardian.com/world/2023/jun/06/finnish-busine...
Which traffic laws are you proposing copying? I'm having a hard time understanding how larger fines can lead to less congestion.
I wish there was more police presence to spot lane-camping and fine them in Germany, too many idiots do it and get away with it.
If I ran Google Maps, I'd ask to route stupid drivers away from my routes. The GPS and phone accelerometer should be able to tell us who they are -- "Oh you have Google Maps actively navigating, GPS says you're going 50mph, and the app in focus is WhatsApp and you're using the phone keyboard? Fuck off! Also we recorded 5 swerve events in the last 10 minutes, hard to stay on your lane when you're texting!"
It'd be unethical, but man it'd be magical...
There's custom software for Elon's Tesla, I wonder if the cloud-based navigation system also directs people away from his routes so he can have a ride on emptier roads...
If I ran Google Maps, I'd ask to route stupid drivers away from my routes. The GPS and phone accelerometer should be able to tell us who they are -- "Oh you have Google Maps actively navigating, GPS says you're going 50mph, and the app in focus is WhatsApp and you're using the phone keyboard? Fuck off! Also we recorded 5 swerve events in the last 10 minutes, hard to stay on your lane when you're texting!"
It'd be unethical, but man it'd be magical...
There's custom software for Elon's Tesla, I wonder if the cloud-based navigation system also directs people away from his routes so he can have a ride on emptier roads...
People hate patronizing systems in their cars already, not sure this would help
The idea is the system would just judge terrible drivers quietly, and then route them away from my route whenever I'm on the road.
Of course the first step of that is I have to gain control of Google Maps...
Terrible drivers cause traffic jams and accidents, who wouldn't want to be segregated away from them?
Of course the first step of that is I have to gain control of Google Maps...
Terrible drivers cause traffic jams and accidents, who wouldn't want to be segregated away from them?
Ticket everyone who deviates from the mean speed too much. You wanna stop at the end of the ramp instead of merge then fine, but it'll cost you the same as the guy who's going 100 in the same stretch.
Nice to hear Google is thinking about this. Was always of the belief that they SHOULD be considering things like scarcity in the various recommendations the apps in their offerings provide.
Also reminds me of that guy in Berlin who caused traffic jams on Google Maps by walking around with a wagon filled with phones:
https://www.theguardian.com/technology/2020/feb/03/berlin-ar...
Also reminds me of that guy in Berlin who caused traffic jams on Google Maps by walking around with a wagon filled with phones:
https://www.theguardian.com/technology/2020/feb/03/berlin-ar...
Interesting, I always just assumed they were already doing this.
I think we need some law that if you are above a certain scale you have to publish traffic data as a gtfs feed, ie basically apple and google have to.
Why cant we have smart stop lights. Nothing more annoying than sitting on a street with nobody coming and a red light for some arbitrary time period that's totally incorrect for the time period I'm currently in
I agree.
Startup Proposal: Intelligent Traffic Signals
https://till.com/articles/smarttraffic
Startup Proposal: Intelligent Traffic Signals
https://till.com/articles/smarttraffic
Relevant XKCD: https://xkcd.com/277/
Most cities have some intelligence on their traffic lights, and they do have traffic sensors to know where cars are waiting.
You might not see any cars and are annoyed waiting at the light, but you don’t know what downstream things they are trying to control for. Maybe if they send you through the light, you are going to join some other traffic event that will cause an issue.
It could also just be suboptimal, but it very hard to know just from what you observe as an individal
Most cities have some intelligence on their traffic lights, and they do have traffic sensors to know where cars are waiting.
You might not see any cars and are annoyed waiting at the light, but you don’t know what downstream things they are trying to control for. Maybe if they send you through the light, you are going to join some other traffic event that will cause an issue.
It could also just be suboptimal, but it very hard to know just from what you observe as an individal
If you drive the same route frequently you can definitely figure out which intersections/areas are improperly configured. There's a stretch of road I drive on several times a week where the speed limit was dropped from 40 to 30 a couple years ago, but the lights are all still timed for 40. If you speed you get a sea of green, but if you drive the new speed limit you end up stopping at half the lights.
I like XKCD but I don't really agree with the underlying premise of this one.
When I was in the Netherlands, one of the global gold standards in terms of urban planning and design, I noticed it wasn't only more pleasant as a pedestrian or cyclist, it was more pleasant as a driver as well. Lights were smart and did not sit on red forever if you were the only one waiting at an intersection.
This comic suggests there's some "invisible, massively complicated" mesh of signal interactions we can never possibly fathom, and therefore wasting precious hours over the course of our lives sitting at an intersection is the most optimal one.
The Dutch have figured this out, why can't North America?
When I was in the Netherlands, one of the global gold standards in terms of urban planning and design, I noticed it wasn't only more pleasant as a pedestrian or cyclist, it was more pleasant as a driver as well. Lights were smart and did not sit on red forever if you were the only one waiting at an intersection.
This comic suggests there's some "invisible, massively complicated" mesh of signal interactions we can never possibly fathom, and therefore wasting precious hours over the course of our lives sitting at an intersection is the most optimal one.
The Dutch have figured this out, why can't North America?
I don't think the answer is as simple as "The Dutch have better traffic light engineers"
There are a ton of factors that go into traffic and traffic patterns. For one thing, I would be curious to see total traffic numbers.
There are a ton of factors that go into traffic and traffic patterns. For one thing, I would be curious to see total traffic numbers.
Also, left turn lanes that are too short for the average number of cars wanting to turn left, and left turn signal cycles that are too short to clear the left turn lanes.
I've lived places where stop lights were all scheduled (unless someone was operating it manually), but most of the lights I experience operate dynamically based on sensors (typically in the road or cameras and ped buttons)
Most cities I've lived in have these in the US...
They exist. Your city needs to set it up. They can also switch to flashing red lights.
I got an idea: let people work from home again.
When Google Maps routes me using a smaller secondary road instead of the main road that I would otherwise have used , I've always wondered whether that significantly changes the amount of traffic that smaller road sees. It's funny to consider that arbitrary black-box changes to the routing algorithm can have a noticeable effect to people that live there.
Happy that research time is being put towards this, however a fuel use decrease of ~0.75% is a bit underwhelming for this particular endeavor, even when consumer cars/vans are 10% of CO2 emissions.
I doubt there would be any improvement. What we have seen is traffic is a constant. If you make make the road network higher capacity or faster, people just move further out or drive to further away stores.
People have an amount of time they will tolerate driving for, and adjust everything else around that.
People have an amount of time they will tolerate driving for, and adjust everything else around that.
I think it's a mistake to represent average speed increase instead of characterizing the speed increase as as hours of full, moderate, and low speed traffic per day.
Because an extra ??minutes a day of avoiding stop and go traffic is worth far more than the average speed increase it tells.
Because an extra ??minutes a day of avoiding stop and go traffic is worth far more than the average speed increase it tells.
Do different people get different routes depending upon "dynamic pricing" type metrics?
Seems like you're playing a dangerous game if your navigation app becomes known for optimizing for the collective good rather than individual fastest transit time-- people will trust your app less, and use a different, more "selfish" app.
How about not driving cars for every single journey? How about not having to go across the city for every errand?
There are solutions to congestion, but they're not technological.
There are solutions to congestion, but they're not technological.
Where isn't there traffic congestion?
If they can do this with traffic, imagine what they’re doing with YouTube ads…
cool, now can you stop randomly having my google maps app go dim and dark as I'm biking making it impossible for me to see what I'm supposed to do next?
Not an exact solution, but you can set it so it tells you upcoming turns and directions. With that I haven't needed to look at the screen much
Well, duh. Grid design that allows traffic to diffuse is a secret superpower of American cities. Along with stroads that seamlessly blend local and arterial traffic.
One of unforgivable mistakes of Project Zero Vision is sabotage of stroads. If forced more traffic onto local streets, resulting in MORE pedestrian deaths.
One of unforgivable mistakes of Project Zero Vision is sabotage of stroads. If forced more traffic onto local streets, resulting in MORE pedestrian deaths.
Do you have stats to support your statement?
Sure. Pedestrian deaths are above the 2015 levels in all the large West Coast cities that went full-on with the Zero Vision project. Numbers are for 2015 and 2025.
Seattle: 7/18
Portland: 11/20
LA: 130/150
SF is unchanged at 24 (they had a HUGE drop from 2024, luckily).
And no, the following excuses do not apply:
COVID - deaths started growing _before_ COVID.
Car size increase - cars did not increase significantly during this time.
Population increase - ditto.
Seattle: 7/18
Portland: 11/20
LA: 130/150
SF is unchanged at 24 (they had a HUGE drop from 2024, luckily).
And no, the following excuses do not apply:
COVID - deaths started growing _before_ COVID.
Car size increase - cars did not increase significantly during this time.
Population increase - ditto.
Pedestrian deaths are up all across the the US.
This tracks with what's happened in my non-grid east coast city that adopted the same. Everyone has a path planner in their pocket that they mindlessly follow which takes them right around all the Vision Zero'd (TM) main roads and through everyone's neighborhood.
The assholes who sell the big plastic speed bumps they've had to put on the residential streets to slow down all the traffic they diverted onto them are making out like bandits though.
The assholes who sell the big plastic speed bumps they've had to put on the residential streets to slow down all the traffic they diverted onto them are making out like bandits though.
For over a decade, I imagined that if I ever landed a job at Google, this would be my most significant project. It made me chuckle a bit when I read the announcement, they finally built it! confirming that my thoughts weren’t entirely delusional XD
rm -rf
Hey I patented this idea about a decade ago:
https://patents.google.com/patent/US20170184409A1
(I'm not saying I'm the first or only person to think of it, but I did patent it, as well as the extra claim of compensating those people sent on the slower route).
https://patents.google.com/patent/US20170184409A1
(I'm not saying I'm the first or only person to think of it, but I did patent it, as well as the extra claim of compensating those people sent on the slower route).
did you build anything tangible with this idea?
Great, Google, you want to reduce traffic congestion? Give me the ability to say "Avoid left turns" in your Maps and Waze directions.
Until you support a feature that simple and obvious, I don't have a lot of interest in your input on this subject.
Until you support a feature that simple and obvious, I don't have a lot of interest in your input on this subject.
Well, Waze is Google
The way to maximise traffic congestion would be to remove trucks off the road during peak times, banning trucks from the fast lane at all times, making it the social norm to toot someone in the fast lane so they move over.
I have a lot of difficulty thinking those changes alone would solve congestion. I’m especially thinking is ski traffic along I70 from Denver to the mountains. The issue is just volume of passenger vehicles, and there are no other realistic routes
Just drive anywhere with more than usual density in traffic and you’ll find trucks in the fast lane when they stop and start create gaps in the fast lane where no traffic can go. If you took out trucks altogether during peak hours you wouldn’t have these slow bubbles of traffic at the worst times..
Edit: let’s think of this from a pure scientific point of view - if you had 3 lanes and split traffic across them based on a range of speed - that would be the most optimised in terms of throughput for all lanes. Now, consider a reverse Amdahl's Law… what’s the worst thing you could do to make the fastest lane crawl which in effect kills total throughput across ALL lanes? Put a slow truck in it! Put a few, and you’ve just turned the lane giving you the highest throughput to most likely the slowest lane.
I just parked my car after another morning of commuting. Thought experiments alone in today’s traffic again confirmed my theory.
Edit: let’s think of this from a pure scientific point of view - if you had 3 lanes and split traffic across them based on a range of speed - that would be the most optimised in terms of throughput for all lanes. Now, consider a reverse Amdahl's Law… what’s the worst thing you could do to make the fastest lane crawl which in effect kills total throughput across ALL lanes? Put a slow truck in it! Put a few, and you’ve just turned the lane giving you the highest throughput to most likely the slowest lane.
I just parked my car after another morning of commuting. Thought experiments alone in today’s traffic again confirmed my theory.
One way is to stop the war on cars. I see many cities basically making driving purposely bad. Super low speed limits, speed bumps, unnecessary bike lanes, poorly timed traffic lights, no right turn on red, etc. It’s all the typical pro bike anti car stuff but it hurts traffic. They never measure travel times in a transparent way as they make these destructive changes.
No. The reason cities are working so hard to build these kinds of safety measures is that cars are horrendously dangerous for people walking and biking. The “war on cars” is a war for the safety and dignity of everyone outside of cars.
They aren’t dangerous. Road fatalities are still very low per mile driven and are falling over time. Cars are getting safer all the time with their sensors and intelligent features like automatic braking. The war on cars is an irrational safetyism campaign driven by selfish bicyclists more than anyone else. And the goal vision zero proposes makes no sense because it doesn’t account for the benefit of cars.
The only way to stop congestion is to get cars off the road.
Cars are the congestion. There is no other definition, and no other solution.
HOW you get cars off the road is worthy of debate. Pretending that there's a "war on cars" is not and never has been. Cars and their drivers have been subsidized for more than a century, never paying the full cost of the damage that they do to the environment, the roads, etc.
1. Car taxes / registrations should be based on weight and energy usage inefficiency and ratchet up quickly for personal vehicles that are larger than some sensible size based on pedestrian safety at no more than 30 kph. (Drivers of modern pickup trucks and SUVs cannot see pedestrians shorter than ~1.7m at ~5m, and the fact that their fronts are basically walls mean that those pedestrians are more likely to be killed on impact or bounced under the tires.)
2. There should absolutely be congestion pricing to enter downtown locations during the day or other times when vehicular traffic will be high. Yes, that means that most deliveries by transport truck would need to be staged into smaller vehicles and delivered to the businesses needing them, or delivered overnight.
3. Uber, Lyft, and Waymo are part of the problem and should be treated as such.
4. There should be more investment in public transit. Paid for by increased registrations and congestion pricing, preferentially. Fares should be reduced, ideally to free. More use of public transit makes it safer and incentivizes making it faster.
5. There should absolutely be more bike lanes in pretty much every city. It's called induced demand and once the infrastructure is safe, you will see increased usage by all sorts of alternative mobility users (but mini e-motorcycles should be licensed just like regular motorcycles and should not be using the mobility infrastructure).
6. Pedestrian and wheelchair users matter first and foremost over any other road user (bikes, scooters, cars, etc.).
We've had 50+ years of Robert Moses being proved wrong. It's time to design cities around people, not around cars. Call that a war on cars if you want, but it's not: it's a war for peoples' quality of life. Cars can be part of the solution, but they need to be treated like the problem they are first.
Cars are the congestion. There is no other definition, and no other solution.
HOW you get cars off the road is worthy of debate. Pretending that there's a "war on cars" is not and never has been. Cars and their drivers have been subsidized for more than a century, never paying the full cost of the damage that they do to the environment, the roads, etc.
1. Car taxes / registrations should be based on weight and energy usage inefficiency and ratchet up quickly for personal vehicles that are larger than some sensible size based on pedestrian safety at no more than 30 kph. (Drivers of modern pickup trucks and SUVs cannot see pedestrians shorter than ~1.7m at ~5m, and the fact that their fronts are basically walls mean that those pedestrians are more likely to be killed on impact or bounced under the tires.)
2. There should absolutely be congestion pricing to enter downtown locations during the day or other times when vehicular traffic will be high. Yes, that means that most deliveries by transport truck would need to be staged into smaller vehicles and delivered to the businesses needing them, or delivered overnight.
3. Uber, Lyft, and Waymo are part of the problem and should be treated as such.
4. There should be more investment in public transit. Paid for by increased registrations and congestion pricing, preferentially. Fares should be reduced, ideally to free. More use of public transit makes it safer and incentivizes making it faster.
5. There should absolutely be more bike lanes in pretty much every city. It's called induced demand and once the infrastructure is safe, you will see increased usage by all sorts of alternative mobility users (but mini e-motorcycles should be licensed just like regular motorcycles and should not be using the mobility infrastructure).
6. Pedestrian and wheelchair users matter first and foremost over any other road user (bikes, scooters, cars, etc.).
We've had 50+ years of Robert Moses being proved wrong. It's time to design cities around people, not around cars. Call that a war on cars if you want, but it's not: it's a war for peoples' quality of life. Cars can be part of the solution, but they need to be treated like the problem they are first.
Wrong. Cars are high utility and should remain on roads. They increase quality of life by giving you a fast way to get to exactly where you want on your own schedule. And designing for cars IS designing for people, obviously. Who do you think is inside cars?
Designing for public transit and cycling benefits far more people than designing exclusively for single passenger cars.
Who do you think are on bikes and in buses?
Who do you think are on bikes and in buses?
> designing exclusively for single passenger cars
What is design for single passenger cars? Most cars can fit 5 people and roads also carry buses, ambulances, and trucks that carry every single product* in the economy.
* Probably with the exception of coal and some mining materials.
What is design for single passenger cars? Most cars can fit 5 people and roads also carry buses, ambulances, and trucks that carry every single product* in the economy.
* Probably with the exception of coal and some mining materials.
100% remote unless absolutely required. Professions like doctors, cooks, massage therapists. This will clear 95% of traffic. Start with mandatory remote for all software jobs.
It's estimated that only 37% of jobs can be done remotely, while 72%-86% of US workers rely on cars for commuting.
The best solution involves creating a multitude of non-car transportation options, to allow workers to choose the most convenient mode of transport, maximizing potential non-car commuting. Bike/ebike, e-scooter, motorcycle/scooter, golf cart, bus, tram, subway, train, ferry.
The best solution involves creating a multitude of non-car transportation options, to allow workers to choose the most convenient mode of transport, maximizing potential non-car commuting. Bike/ebike, e-scooter, motorcycle/scooter, golf cart, bus, tram, subway, train, ferry.
I would occasionally go to the office toward the tail end of covid and traffic was essentially non existent. We were well past the big lockdowns and shuttered restaurants at that point but RTO hadn't kicked in. It wouldn't take much to drastically change the traffic landscape.
1. Extensive support of public transport: metro, tram, dedicated bus routes (separate from car traffic), dedicated paths for bicycles.
2. ... maybe whatever is this ...
UPDATE: here's a good graph - https://en.wikipedia.org/wiki/Public_transport#/media/File:P... , i.e. car traffic is often congested because of inherent low passenger bandwith. If google wants to manage traffic as internet routing - why then stick with outdated low bandwith ethernet cable?