Challenge: re-design speed bumps. They should still induce drivers to slow down, but without making them drive over a bump. How do you do it? Answer after the jump.

You have to slow down to fit your wheels in the gap. But when you do, you ride through with no bump.

This works great for golf carts (the picture was taken on a golf course) but it could be modified to work for cars where the wheel base varies. You only need one narrow gap. The other gap can be wide enough so that most cars can fit through both.