Automatic speed limit of vehicles in accident prone zones.

Driver's irresponsible driving habits lead to accidents on the road frequently. Schools, parks, hospitals, hills, and highways are where accidents occur most frequently. A prototype model of automatic speed control system of a vehicle has been developed in an effort to lower the frequency of accidents. Particularly around the restricted area, if the vehicle's speed rises, the proposed automatically adjusts the vehicle's speed to fit the surroundings. A radio frequency transmitter is mounted on the side of the road, and a radio frequency receiver is installed inside the car. The radio frequency transmitter broadcasts the needed limiting speed to the receiver installed inside the vehicle when it travels through the restricted area. By this implementation, the zone limit is communicated to the vehicle's microprocessor and vehicle speed is obtained by placing a speed sensor placed inside the vehicle. The microprocessor compares the received signal with the actual speed of the vehicle and it also controls when sparks are used to ignite the gasoline and when fuel is to be injected into the vehicle to increase speed or slow down using fuel injection technique. The fuel valve is integrated with the actuator and is managed by an electronic control unit in this fuel injection method. This technique uses a servomotor attached to the fuel valve to determine when to open the fuel valve partially or completely, to control the vehicles speed. Hence the vehicle speed is controlled and enhanced the safety measures to reduce the number of accidents. [ABSTRACT FROM AUTHOR]