Dynamic Speed Bumps
Dynamic speed bumps differ from conventional speed bumps in that they only activate if a vehicle is traveling above a certain speed. Vehicles traveling below this speed will not experience the discomfort of a conventional speed bump. Dynamic speed bumps may allow the passage of emergency vehicles at higher speeds.
In one design, a rubber housing is fitted with a pressure valve which determines the speed of a vehicle. If the vehicle is traveling below the set speed the valve opens allowing the bump to deflate as the vehicle drives over it, but remains closed if the vehicle is traveling too fast. The valve can also be set to allow heavy vehicles, such as fire trucks, ambulances, and buses to cross at higher speeds.
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