Road mishap is most unwanted thing to happen to a vehicle user, however they happen regularly. Main causes of accidents are due to human faults. The most common causes of accidents due to over speeding of the vehicles. High speed vehicles are more liable to mishap than the slow speed vehicle and the cruelty of accident will also be more in case of high-speed vehicle. Higher the speed of vehicles, greater the risk of mishap. So, to stay away from such kind of accidents, it is necessary to alert the driver and to control the speed of vehicle automatically. The main objective of this proposed work is to develop signaling unit to indicate the type of zone to the vehicle and to control the vehicle speed. Every zone which having speed limit sign board like school, highway and etc. may have a transmitter tag to transmit the zone information by RF signal. This signal should be received by the vehicles and accordingly changes the speed limit of the vehicle. As practically, an actuator may be used to control the throttle of the vehicle. It is based on the idea of vehicular speed monitoring and control system. The speed of the vehicle is automatically lowered and locked to a particular limit as it enters the restricted area and is unlocked or relieved as it exits the restricted area, so it is acting as an automatic speed limiter and reliever.
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