The gradual rise reduces the jolt caused by a typical speed bump. The Police Department expends less effort to gain voluntary compliance to the speed limit. Fewer speeding tickets are issued and the overall speed of traffic is reduced near the undulations. Also, the required slow-down increases response time for emergency vehicles. Studies in other cities have shown a slight increase in noise levels near the undulations.
Some drivers continue to speed in spite of the undulations.
These methods include police enforcement, use of the speed trailer, and other traffic control devices such as signing and striping. The City has adopted engineering criteria for pavement undulation eligibility. In addition, the following requirements are highly recommended. The Transportation Commission may exempt the proposal from one or more of the following if all the basic requirement warrants are met. The street segment shall be at least 750 feet long.