Women on Bikes
There has been a fair amount of research done on the “gender gap” in cycling; men bike more then women, though because our data suck we don’t know exactly how much. Different studies show gaps as low as 57-43% or as high as 75-25%. But everyone agrees that women are less likely to bike, and are more likely to be concerned about the safety of the roads they use.
Biking uber-pundit Jennifer Dill (Portland State) did a great study on revealed route preferences of cyclists in Portland that showed significant gender differences in willingness to accept longer travel distances in exchange for a more pleasant (or perceptually safer) route.