We’ve had several people killed in their living rooms in the last few years by cars just crashing straight through the front of the house. I’m sure keeping a head on a swivel will work there.

Enforcing speed limits has been shown time and again with research to not work long term. Just chasing people around only gets a brief change in behavior. The design of the road sets the speeds, not the fear of punishment. Re-engineering the roads to enforce slow driving is the first real step, the second being to remove car routes in favor of mass transit, biking, and pedestrian routes being the actual win.