> § 11-1512. Bicycles on sidewalks. (a) A person propelling a bicycle upon and along a sidewalk, or across a roadway upon and along a crosswalk, shall yield the right of way to any pedestrian and shall give audible signal before overtaking and passing such pedestrian.
No idea if the lakefront trail is classified as a sidewalk but there are at least some cases in Illinois where either a bell or a "on your left" are legally mandatory.
Yeah, it's understandable that the real world is messy and user-sourced data can be very suspect.
The case I'm thinking of is the eastern end of SR-520 over Lake Washington in the Seattle area. It has hundreds/low thousands of bicycle crossings/day (so surely dozens of Garmin users/day), the background is a dammed freshwater lake with a well known elevation, and clear view of the sky. Yet the elevation data is garbage somehow.
It doesn't really matter for planning purposes as any alternative has such a huge delta but it does signal that user data isn't being utilized to refine their data set even on high volume segments.
Yet it's unclear to what extent they actually use them - on freeway adjacent bike paths that have different gradients than the adjacent freeway (typically steeper), it's very clear Garmin is using data referencing the freeway.
> § 11-1512. Bicycles on sidewalks. (a) A person propelling a bicycle upon and along a sidewalk, or across a roadway upon and along a crosswalk, shall yield the right of way to any pedestrian and shall give audible signal before overtaking and passing such pedestrian.
https://codes.findlaw.com/il/chapter-625-vehicles/il-st-sect...
No idea if the lakefront trail is classified as a sidewalk but there are at least some cases in Illinois where either a bell or a "on your left" are legally mandatory.