Actibump, a speed bump only for speeders

Speed bumps have a certain brute-force, undeniable effectiveness: you'd better slow down, or you car (and your butt) will be very unhappy. One problem is that this affects those obeying the speed limit as well as speeders; everyone gets a compromised ride experience. Swedish firm Edeva has designed a solution: Actibump, a speed-dependent speed bump. Radar detects the speed of an oncoming vehicle and adjusts the bump accordingly, and if you're below the speed limit, there's no bump at all. There are certainly tradeoffs here: the unit could break down (which traditional speed bumps won't do); there's the issue of educating the driving public about those "bump if speeding" signs. But if everything goes smoothly, it could result in everyone going more smoothly, too.
[via Core77]