This paper describes a new smart braking system for bikes. Road accidents are commonplace in today’s scenario. Accidents cause worse damage, serious injury, and even death. Accidents prevention has been one of the leading areas for research. Mainly focus on prevention of accidents due to nervousness, drunken driving, etc. Manual methods of applying brakes are always dangerous as it leads to accidents. Nowadays no. of accidents are increases. Unconsciousness of the driver, uncontrollable speed of the vehicle and manual operation of braking systems are the reason for accidents. It is necessary to control brakes automatically through electronics devices to minimize accident problems. In this research paper, we proposed an effective methodology for the automatic controlling of a braking system to prevent accidents with the help of electronics engineering. The system consists of ultrasonic sensor wave emitter fitted at the front portion of the bike and ultrasonic receiver to receive the signal. The actuator pulls the brake lever through which a piston is pushed which then uses hydraulic fluid to apply brakes(disc type). Here we use actuator in this system instead of servomotor. This reflected wave gives the signal to MCU to applying brakes automatically. By using this System we can reduce no. of accidents.