This document proposes a bus tracking and tracing system using GPS and a mobile/web application. It would allow users to see the location and estimated time of arrival of buses on their specified routes. GPS devices in buses would track their location in real-time. A server would store route, bus, and stop data to calculate ETAs. The system aims to reduce traffic and pollution by making public transport more convenient and efficient for commuters. It has the potential for wide adoption across cities in India and other developing countries.