> 50%+ of car trips are less than three miles... as a society what we need is a way to make those trips without cars. then you've only fixed 50% of car trips,

> 50%+ of car trips are less than three miles... as a society what we need is a way to make those trips without cars. then you've only fixed 50% of car trips, and much less than 50% of vehicle miles and probably not done much at all for highway deaths. all the urban bike infrastructure in the world isn't going to do much for rural and interstate problems.