I guess what I was trying to get at was that you need to also consider the likelihood of collision in the first place. I'd assume that's also higher in resident

I guess what I was trying to get at was that you need to also consider the likelihood of collision in the first place. I'd assume that's also higher in residential areas -- not sure if it's just me, but I think that would sound like a far more compelling argument than just considering the chance of death assuming a collision.