[baylisscg]

In the UK the limit is the limit. There is leeway to exceed the limit by up to 10% to allow safer overtaking (you're usually using the oncoming lane and opportunities are scarce) and to take the accuracy of car speedometers and police radar guns into account.

In Australia you can be fined, heavily, for exceeding the limit by any margin. e.g. Limit was 100kph you were clocked at 102.

If you're driving so much over the limit that you're damaging your car on a properly built speed bump you're going too fast. In the UK you'd run the risk of getting hit with "Driving without due care and attention".

[darkerside]

Honestly that makes way more sense to me. As is, (almost) everybody in America is breaking the law, which means we can all be pulled over without cause at any time.

Still, system being what it is, this speed bump makes no sense in the US.