Implementation of Traffic Light Controlling System for a Simple Intersection with VHDL using Quartus II

Abstract

In the era of urbanization in the 21st century, the number of vehicles on the road has increased drastically to cope with the increased population of the city which directly affects the traffic on the street and more importantly on intersections. Automatic traffic signaling system can plays a vital role to mitigate vehicle congestion in the critical intersections of the busy roads. To ensure hassle free mobility of vehicles in the intersection on the street, the appropriate traffic signal lights are necessary that coordinate traffic in various directions on the streets. A simple intersection on the road is considered for the simulation of traffic signaling system. VHDL code was written in Quartus II to implement traffic light system for specific intersections on the road. The vehicles are always moving on the main road, meaning green light is always ‘1’ until there are vehicles approaching the side road. When the vehicles arrive on the side road which is sensed by sensor, then the traffic controller takes the initiative to schedule the traffic light, from green to red light in the main road and red to green light in the side road. The proposed traffic signaling system works properly, which is verified during simulation. In this paper, simple intersection is considered due to simple design and easy implementation.