The IoT Based Energy Efficient Traffic and Street Light Management System is an innovative solution that utilizes solar energy and IoT technology to reduce energy consumption on street lights, detect faulty street lights, and automate traffic signals based on traffic density. The system includes various sensors, such as LDR, IR motion, and DHT11, that collect data on temperature, humidity, sunlight intensity, and street light intensity to make decisions based on the information. With a mobile app, the system can be controlled from anywhere in the world, and the data can be monitored, controlled, and stored for further analysis through "thingspeak" and the Apps for the system called "Smart Traffic". This project aims to improve energy efficiency, reduce maintenance costs, and provide a safe and reliable system for managing traffic and street lighting.