That's a bad idea - the speed bump can be semi-invisible in bad weather, and you'll have cars hitting it at high speed, going airborne and crashing. There's a

That's a bad idea - the speed bump can be semi-invisible in bad weather, and you'll have cars hitting it at high speed, going airborne and crashing. There's a reason they have large warning signs before a speed bump. There is also the implication that speed is the issue - but the linked video shows a car crash with slow cars, so they problem may lie elsewhere (visibility probably).