In the US, speed limits have a tendency not to be set to a "safe" speed, but rather to a speed that will optimize revenue from tickets. It's not terribly hard t

In the US, speed limits have a tendency not to be set to a "safe" speed, but rather to a speed that will optimize revenue from tickets. It's not terribly hard to find, in any town or city here, plenty of streets and even highways which have limits that are obviously below both the average speed of traffic and the design speed of the road, set largely for political (often money, though sometimes to appease residents who feel a street is "too fast"). So yes, let's have sensible limits first, and then worry about the enforcement.