I'm not sure there's much clear data on this. I have plenty of anecdotes from myself and other cyclists, however. Here's what is clear: Many cyclists worry abo

I'm not sure there's much clear data on this. I have plenty of anecdotes from myself and other cyclists, however. Here's what is clear: Many cyclists worry about getting rear-ended, which presumably is a major part of what bike lanes are supposed to eliminate, but those sorts of crashes are rare: http://bicyclesafe.com/#rearend2 http://bicyclesafe.com/#rearend2 I can recall a pro-bike-lane advocacy organization had some different data that said being rear-ended is actually common, but that seems very discordant with the remainder of the data, and they seem hardly unbiased. (The webmaster of the site I linked to seems neutral on bike lanes.) The main risks come from intersections, and most bike lanes, even protected ones, don't address that. My concern is that bike lanes may give inexperienced cyclists a false sense of security. These problems are relatively easily avoided if one is aware of them. See this website to learn about how to avoid the most common types of bike crashes: http://bicyclesafe.com/ http://bicyclesafe.com/