General Transit Feed Specification is a format for public transit agencies to publish this information. There are a few repositories like https://transitfeeds.com.
I think this could be said for many technologies: the cashier scans barcodes, the cook at McDonalds flips burgers when the alarm goes off, the anesthesiologist or pilot watches gauges...
Overall these data sets have been pretty well studied for the past few decades. The results are well documented: e.g. 6pm to midnight is the deadliest time, young males are the riskiest, older drivers are also risky, etc. Weather can actually be good for safety because people often drive slower and there are fewer cars on the road in bad conditions. But yes, weather can be a factor too.