Automatic One-way traffic control technique employs a microcontroller and different types of sensing circuits, to control the movement of the vehicles in one direction only, thus avoiding a head on collision between the two cars. In this method, a sensor detects the presence of the vehicle in front of the barrier and gives input to the microcontroller, which provides a command to the H-bridge. By using the concept of H-bridge, the direction of DC motor was controlled. An LCD was provided which indicates the current status of barrier gate. A solar panel is used which charges the battery and provides a necessary power supply of 5 Volts along with a voltage regulator. Thus the concept of renewable energy is implemented.