Earlier quoted context omitted.
I dont think ive ever seen a fast car on a dense city street (difficult to go fast when theres gridlock) whereas speeds above 55 mph were common on the 'nice' suburban street I grew up on
The fatality rate spikes around 30mph. Most city traffic is definitely in that range (at least that I've experienced). > speeds above 55 mph were common on the 'nice' suburban street I grew up on Thats not a suburban street, thats a highway interconnecting the suburb. Non-driving connection within a suburb is certainly a huge problem.
In san Francisco, most city traffic is less than 30 mph because of high density