Quote Originally Posted by BLUETIT View Post
Some doctors have dismissed this as total codswallop, they say at 30mph, the car will hit a person and the person will bounce off (obviously still injuring themselves)
At 20mph, the car will actually run over the person, squashing them.

Doctors saying this, not me !
If the person bounces off the car at 30 then they'll hit the road with greater force, than if they got hit by a car going 20. A couple of broken legs won't kill you, but smacking your head on some tarmac at 30 will.