Project Description: This project presents a Smart Traffic Control System designed using Arduino technology to enhance traffic flow efficiency and safety at intersections. The system dynamically adjusts traffic light timings based on real-time traffic density and weather conditions. An ultrasonic sensor is used to detect vehicle density and determine optimal red and green light durations. Additionally, a DHT sensor monitors ambient temperature and humidity, while a rain sensor detects precipitation. Together, these sensors provide a responsive traffic management solution capable of adapting to environmental changes. The system aims to reduce congestion, improve driving safety during adverse weather, and lay the groundwork for future integration with smart city infrastructure.