Design and Simulation of an Intelligent Traffic Light System for Cross Road at G.R.A Junction, Aba Road, Port Harcourt

This paper presents the design and simulation of an intelligent traffic light control system for Cross road at Government Reserved Area (GRA) junction along Aba Road, Port Harcourt in Rivers State. This was motivated on the need to reduce traffic congestion in GRA junction Port Harcourt during rush hours. The system was developed on the Arduino 1.8.7 integrated development environment (IDE), implemented using the C++ programming language and simulated on the Proteus 8.9 SP3 platform. The design was based on signal timing sequence and lane population detection. Two Light Dependent Resistors (LDR) sensors were assumed to be placed per lane and 32m apart from each other to accommodate 7 vehicles. The operation is based on signal timing sequence when all lanes have approximately the same population of vehicles and when the population on the number of vehicles on each lane does not exceed 7. Lane preference was activated by the lane population sensors when the population of vehicles in a lane exceeds or was at the second lane population detection (LDR) on that lane thus giving such lane or lanes right of way and ignoring the lane with less vehicles. The results show that when this sequence was in place, only one lane was passed (given the right of way) at a time thus ensuring safety of vehicles plying the road.