I'm sure we can do both. It was you who suggested being lenient on people going 35-40 mph in a 30 zone; 30 suggests the likelihood of encountering pedestrians,

I'm sure we can do both. It was you who suggested being lenient on people going 35-40 mph in a 30 zone; 30 suggests the likelihood of encountering pedestrians, hence the mention of the survival rate. I'm quite with you on what we can do in high density locations, but I think you have not quite thought it through. In high density locations, there should simply not be any cars. The huge compromises are not justified where pedestrians outnumber them 5:1 anyways.