The main objective of this project is to develop signalling unit to indicate the type of zone to the vehicle and to control the vehicle speed. Every zone like school, highway etc may have a transmitter to transmit the zone information by RF. This signal should be received by the vehicles and accordingly varies the speed of the vehicle. In practical, an actuator may be used to control the throttle of the vehicle. However, to show the demo module here we used a DC motor, and varying the speed of it. The project is mainly used to control the speed of a moving vehicle according signal received by the receiver from transmitter.