Designers Jae-yun Kim & Jong-Su Lee has designed a speed bump which is intelligent and encourages the drivers to go slow. If you go slow the speed bump will flatten tada its no more speed bump. If you go fast it remains speed bump.

So what do they do?

They make a speed bump that’s based on retractors that open if the impact with them is small enough. These speed bumps can be configured so that if a car is going below 30km/h, the speed bump flattens; over 30km/h, the force causes the retractor to stay closed, keeping the speed bump active.

What a lovely goal: “Encouraging drivers to retain a constant slow speed will reduce the amount of stops and starts made, and thus, the amount of exhaust waste from the car. It is hoped that this retractable speed hump would therefore have positive effects on energy consumption and pollution.”

more here