Adaptive Traffic Light Controller is a smart traffic management system built using ESP8266 and embedded programming. The system dynamically adjusts green signal timing based on real-time traffic density detected using IR sensors. If higher traffic density is detected on one road, the controller increases the green light duration for that direction to improve traffic flow efficiency and reduce waiting time. The project was implemented using FSM-based traffic logic and later extended with custom PCB design in KiCad. The system demonstrates concepts of adaptive traffic control, real-time decision making and embedded systems design.…