The objective of this research is to develop a system to keep the vehicle secure and protect it by the occupation of the intruders. The aim is automatically controlling the speed of vehicle and accident avoidance using arduino and ultrasonic sensors. Arduino mega 2560 is used to create the path through programing. The programed path is fed into the Arduino which is followed by the vehicle. Whenever any obstacle is detected by the running vehicle, depends on distance automatically control the

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... ed of vehicle. The ultrasonic sensor system continuously sends signals and monitors any car or other obstacles are in front of vehicle. The distance up to which ultrasonic sensor can work may be up to 4 m. When any obstacle or vehicle is detected by ultrasonic sensor system, it will send signal to the embedded board. After receiving this signal embedded board sends a signal to the motor to reduce the vehicle speed automatically which can control vehicle speed immediately. Vehicle is controlled automatically without any manual operation when the obstacle is at 4 m distance away from the front vehicle. In critical cases, if vehicle is met into accident GSM send a message to the user.