Abstract: Nowadays people are driving very fast; accidents are occurring frequently, we lost our valuable life by making small mistake while driving (school zone, hills area, and highways). So in order to avoid such kind of accidents and to alert the drivers and to control their vehicle speed in such kind of places the highway department have placed the signboards. But sometimes it may to possible to view that kind of signboards and there is a chance for accident. This paper presents smart zone based vehicle speed control using RF and and Accident Prevention system. Whenever the vehicle is within the zone, the vehicle speed is controlled by receiving the signal, i.e.., every time the vehicle speed is decreased to some cutoff and kept constant until the vehicle moves out of the zone, and then the vehicle can get accelerated by itself.

Keywords: Speed Control, RF, Embedded System, Accident prevention.