A Survey of Traffic Congestion Measure Towards a Sustainable Traffic Flow at Garrison Intersection in Port Harcourt, Nigeria

The huge increase in motor vehicles on Port Harcourt Road is causing traffic problems like accidents, congestions, delays etc., especially at intersections. This paper examines the traffic problems and sustainable improvement of Garrison intersection along Port Harcourt – Aba Expressway. A proper traffic study at the intersection was carried out and the factors of the intersection causing delay were identified using the Relative Importance Index (R.I.I) from a well-developed questionnaire of about 250. Data regarding the traffic volume and pedestrian movement activities were collected through direct field surveys. Analysis of the collected data revealed that the major causes of traffic congestion at Garrison Intersection based on the R.I.I ranking are Inadequate Bus Stop Capacity, Poor Traffic Control, Poor Driver Habit, No Pedestrian Crossing Facility, and Inadequate Road Capacity. Various remedial measures are also proposed, focusing on the intersection improvement with the provision of U-turnings, Pedestrian crossing facilities, Bus stop bays off the road.