Comment by acdha

The problem with that approach is that it only considers drivers, and it lets the aggressive drivers influence the speed limit by bullying safer drivers. Outside of freeways, we shouldn’t dedicate millions of dollars in public space to private car drivers, so we should be looking at the rest of the community and ensuring that cities aren’t built around the idea that everyone needs a private vehicle. That’s a financial hardship for many people (where I live, cars are neck and neck with food as a household expense, behind only housing) and it freezes out the roughly ⅓ of the population who can’t drive. It also locks in significant health and environmental costs and we don’t tax driving to pay for those.