Variable Speed Bumps - More motivation to take it slow...

Speed bumps are already designed to have more of an impact on your ride the faster it's going, but this concept from Jae-yun Kim and Jong-Su Lee makes the difference a little more dramatic. These speed bumps would include a mechanism which allows them to be flattened if the car is traveling slowly enough, but keeps them rigid if it's going too fast. The mechanism itself would take some work, but at least it's plausible; and the amplified effect of keeping your speed down would be a good extra motiviation around playgrounds and schools. Good stuff!
[via Gizmodo]