Design FSM Based Coordinated Four -Way Intersection Specific Automated Traffic Light Controller.

Abstract

Traffic congestion at urban road intersections has become a major challenge due to the increasing number of vehicles and inefficient fixed-time traffic signal systems. This paper presents an intelligent traffic light control system designed to improve traffic flow and pedestrian safety through adaptive signal management. The proposed system uses IR sensors to detect vehicle density on each lane and dynamically allocates signal timing based on traffic conditions. A sound sensor is incorporated to identify emergency vehicles such as ambulances and fire engines, enabling signal priority for rapid clearance. This feature reduces delay for emergency services and improves response efficiency. The controller is designed to operate with reliable timing control under varying traffic conditions. The complete system is implemented using Verilog to achieve hardware-level accuracy and efficient digital design. Functional verification is carried out using SystemVerilog through simulationbased testing. The results confirm correct signal switching, emergency prioritization, and adaptive operation. The proposed design offers a scalable and costeffective solution for intelligent traffic management in densely populated regions such as India