In this project work the design and construction of a model of automatic braking system for vehicles in hill station is to be developed. The mechanism has been developed to stop the vehicle from rolling back word when the vehicle is moving in the hill roads. This construction made of two phases in a first deigns of ratchet and pawl mechanism, frame, shaft, etc. is done and in second sensor selection and interference is done. Ratchet and pawl mechanism has been fabricated and assembly with sensor interface is tested. The proposed mechanism is to reverse break using ratchet gear. By reverse locking the differential is disengaged from the axle. Thus the power is directly transmitted to the axle and hence to the wheels. This will considerably reduce the power loss in some occasions when unwanted loss is happening due to the transmission if power from the shaft to the ratchet gear and then to the axle and hence to the wheels. So in mechanism the unwanted power loss in the due course of transmission through the gear wheel is reduced.

The aim of the project is to design and construction of a module used for vehicles within the hill stations. Automotive vehicle braking system is used once vehicle is moving upward direction. These sensors began within the automotive business particularly for crash detection in airbag systems. During this work, Ratchet and pawl mechanism is known to arrest the backward motion to the automotive. The ratchet is placed within the front drive shaft and also the pawl is fitted with the frame. Once the vehicle is moved within the hill road, the lever should build the pawl to the touch the ratchet. If the vehicle tends to move backward direction, the pawl would stop the ratchet to move Counter Clock-wise direction with respect to front wheel. Because the vehicle is in neutral position, the pawl engaged the ratchet and also the vehicle didn't move in. The IR TRANSMITTER circuit is to transmit the Infra-Red rays. If any obstacle is there during a path, the Infra-Red rays mirrored. This mirrored Infra-Red rays are received by the receiver circuit is termed "IR RECEIVER". The IR receiver circuit receives the mirrored IR rays and giving the management signal to the negative feedback circuit. The negative feedback circuit is used to activate the solenoid valve.