Speed limits in the US also are in place to generate revenue, they don’t make people safer. The original cannonball run was a protest against arbitrarily low federal speed limits, and they demonstrated that it’s distracted drivers that cause crashes, not speed. There are areas where the highway will go from 70 mph to 45 mph for 2 miles as it passes the jurisdiction of a small town, and you know for sure their sherrifs will be posted pulling as many people over as possible, and people hitting the brakes hard at the speed limit signs are getting crashed into on the regular. The way speed limits are usually set is they let people drive the road at whatever speed they feel is safe and comfortable, and then they set the limit at the 85th percentile of the recorded speeds, but then it gets put up to town hall meetings to get voted on and typically the engineers are forced by the Karen’s voting to lower the speed limit by 20 mph or so. So when people are driving on the road, the speed that they would feel safe and comfortable driving is way faster than the speed limit set for the road. Which actually causes way more accidents then if the speed limit was faster. This is why in the US nobody follows the speed limits and pretty much everyone goes at least 5 mph over the limit, with many pushing 15-20 over in some areas occasionally and they face huge fines if caught.