DESIGN OF TRAFFIC SIGNAL AT KPAKUNGU INTERSECTION, MINNA

Abstract

Traffic signals play a very important role in controlling traffic flow at intersections. There are numerous traffic signals present at various intersections in Niger State. This paper is aimed at designing traffic signals at Kpakungu rotary intersection. The traffic volume for each arms of the intersection were obtained from field study for Monday to Friday between 7:00 am – 10:30 am in the morning and 3:30 pm – 7:30 pm in the evening and an average volume of traffic at peak hour was compute per day. The volumes obtained were analyzed for each section of the arms and critical volume of vehicle per hour per lane also obtained. The saturation flows obtained at the intersection and the traffic phasing of each arm also designed and the corresponding traffic flow of one arm into another estimated. The traffic signal was design based on the critical flow at peak hours and the corresponding cycle length computed. The traffic signal design was discovered to be insufficient as the desired cycle length yielded a negative result and a flyover bridge was recommended for the western by – pass road (Arm A and B) which yielded the highest traffic volume to control the traffic congestion at the intersection.