In this paper we introduce a new technique in automobile technology how to mechanically avoid accidents and control speed through sensors. Traffic accidents are increasing day by day in South Asian countries due to drivers not obeying traffic laws. In our proposed system we have determined a balanced movement by determining the distance from one vehicle to another using ultrasonic sensors and Arduino UNO. If the distance from one vehicle to another vehicle is more than 9 meter then the vehicle will have maximum speed. Our proposed technology will halve the vehicle speed from 9 meter to 3 meter. The vehicle will remain stable at a distance of less than 3 meters. We hope our proposed system will play an effective role in populated areas.