Web-based IoT solution for monitoring traffic lights

WCCC-imageA Web-Based IoT Solution for Monitoring traffic lights Using MQTT Protocol and Embedded system through GPS zone transition

Traffic is a major concern for most metropolitan cities throughout the world. This is a new GPS-based system that is more efficient than current traffic control systems, also it has zero infrastructure cost. This system integrates an Android application and communication modules with an embedded system and power supply. The intelligent traffic control system (ITCS) is based on a simple principle; the principle being that, “an ambulance can only move ahead if there is space for it” and “the signal remains green until the present vehicles have passed”. This is achieved by creating zones at traffic junctions and whenever there is a transition of a vehicle from one zone to another, there is an alert message sent to the traffic light to turn green. The alert message will be sent to other traffic lights at a distance of 40-50 meters away from the current traffic lights so that all other vehicles can move freely and traffic can be controlled in an emergency situation.

Working principle: Zones are created around the traffic junction. Whenever the vehicle is travelling from one zone to another in the traffic junction, there will be an alert message generated by the Android application. The alert message generated is published to MQTT broker (Message Queue Telemetry Transport broker) with a specific topic name. The embedded board is then programmed to subscribe to a specific topic from the central server. Once an alert message is received, the embedded board will start communicating with the traffic lights and they will be controlled according to the requirement.

 Conclusions & Future work : This technology can be used mainly during emergency situations for ambulances and fire engines etc. and provide traffic free movement inside busy cities. Further, going ahead it can be used in buses to mirror bus timetables and reduce delays/waiting times. Also, we are trying to integrate this developed embedded system with SCATS (Sydney Coordinated Adaptive Traffic System) which uses a responsive approach to control urban traffic in Ireland.