If you build your infrastructure in a way that people have to drive much more to do the same, should you really discount this difference ?

I rarely drive the car because I can reach by walk any place required by my daily necessities... of course I don't risk a fatal accident as much as somebody that drives daily for work and has to take the car for any kind of shopping.

Put in another way: if are considering ways to lower traffic fatalities, lowering the time that people need to spend in their car is one way to do it.