i think the study was also interesting in its' broad based truths about bicycling- bicyclists inherently recognize they are vulnerable road users, and that perceived safety as well as actual safety have an effect on bicycling participation. There's a lot more to that too...
This is a well prepared and far reaching report; i recommend it to any one interestered in promoting bicycling and improving bicyclist safety in America. (Anyone NOT interested in promoting bicycling in america should reach for a copy of effective cycling.)