A speed bump, speed hump or ramp is a traffic calming feature of road design used to slow traffic, or reduce through traffic, via vertical deflection. They are also known as a sleeping policeman in British English. A speed bump is a bump in a roadway with heights typically ranging between 3 and 4 inches (7.6 and 10 cm). The depth of speed bumps is typically less than or near to 1 foot (30 cm); contrasting with the wider speed humps which are typically 10 to 14 feet (3.0 to 4.3 m) in depth.
Speed bump fixings and supplier in Ahmedabad, Gujarat, India