Increased bicycling dramatically reduces risk of injury

A September 2003 article in Injury Prevention carefully lays out a number of different sets of data that show that increased bicycling and increased walking in a community lead to a lower risk of crashes with motor vehicles for walkers and cyclists. The results are quite dramatically:
An individual’s risk while walking in a community with twice as much walking [or twice as much bicycling] will reduce to 66%. . . . Accordingly, policies that increase the numbers of people walking and bicycling appear to be an effective route to improving the safety of people walking and bicycling.