They have more catch-up to do. The US already does things like traffic control, but they have a different goal: they want drivers to feel like they’re making progress instead of actually improving things.

For example, we put traffic signals everywhere instead of teaching people to use traffic circles. Why? Drivers like to drive fast and would rather stop than slow down. Traffic circles improve flow, but they do reduce average speed, whereas traffic lights decrease flow and increase average speed. It’s stupid, but we’re entitled jerks who like to show off at signals.