There is usually opposition from the Police, Fire Brigade, Ambulance Service and Bus Companies to the use of speed control humps. The Emergency Services object because humps increase their attendance times for emergency calls, and thus risk the lives and property of the people. The Ambulance Service and Bus Companies object because of the discomfort and possible injury that may be caused to their passengers and the increased wear and tear on vehicles, particularly buses going over speed tables every day.
There are regulations governing the layout of speed control humps. There must be a form of "slowing feature" - usually formed by a change of priority (traffic entering the system has to turn sharp left or right into the road, or has to "give way". Sometimes mini roundabouts are used at the start of a system of humps.