It is known as the Intelligent Bump. It is a clever system designed by Mexico-based Decano Industries. The Intelligent Bump will stay flat when vehicles cross over it at speed limit, but retracts forming a bump when a vehicle cross it exceeding speed limits, so this device only affects vehicles running over speed limits.

“Low Cost engineered effective speed restrictor, autonomous operation, it is a real lifesaver by reducing accidents, pollution killer because reduce stops and accelerations compared with common bumps, so also improves traffic speed”

Video after the break.

[via Techeblog]