| 摘要 |
A system for controlling the speed of vehicular traffic on a road comprises a plurality of adjustable height bumps disposed at intervals along the length of the road. The heights of individual bumps in the direction of vehicular traffic are preferably adjustable to provide increasingly noticable indications of speed as the traffic travels along the length of the road. The system is useful to impose speed restrictions, for example at road works or in adverse weather conditions. |
