Is very small compared to the lives saved by those measures. Traffic safety laws saves about 20k young people per year in USA. Assume each had 40 years left to

Is very small compared to the lives saved by those measures. Traffic safety laws saves about 20k young people per year in USA. Assume each had 40 years left to live, that is 0.8 million years, or about 0.002 years per person per year. That is about half a day of life saved per year per person, meaning 12 hours. Putting on a seatbelt takes a few seconds and you do it a few times per day, say 20 seconds per day. Add that up over a year and you get 100 minutes or about 2 hours spent seatbelting to save 12 hours of life. Traffic lights takes more time, but they also allows for more dense traffic so I don't think that removing them would help at all. I doubt San Francisco traffic would get any better if you removed most traffic lights, likely it would get worse in all the chaos, so unless you prove to me that they actually hurt commute time rather than help I put those savings on the seatbelts.