I don't think it's necessary to jump right to data collection, the routing algorithms and incomplete maps are the issue. Of course, you'd need additional data about bike lanes, etc (which could come from crowdsourced data? Maybe that's what you are alluding to?).
As it is, offline routers such as Brouter and OSMAnd do a much better job, and it's pretty easy to convince other cyclists to use them.
Traffic jams are almost never an issue when biking - heavy car or bike traffic can slow you down, but by that point you have at least the same density as car traffic jams for data collection...
As it is, offline routers such as Brouter and OSMAnd do a much better job, and it's pretty easy to convince other cyclists to use them.
Traffic jams are almost never an issue when biking - heavy car or bike traffic can slow you down, but by that point you have at least the same density as car traffic jams for data collection...