The project aims to save energy by detecting vehicle movement on highways and turning on the block of street lights ahead while simultaneously switching off the trailing lights. Sensors are used to detect vehicle movement and activate the lights ahead. When the vehicle moves ahead, the trailing lights automatically turn off, resulting in significant energy savings compared to conventional systems where street lights remain on continuously.
An alternative mode of operation allows the lights to remain on at 10% intensity. When a vehicle passes by, the lights ahead switch to 100% intensity while the trailing lights return to 10% intensity. Microcontroller-based Pulse Width Modulation (PWM) is employed to control the intensity. The sensors detect vehicle movement and relay the information to an 8051 microcontroller, which triggers commands to switch the lights on/off accordingly.