An Evaluation of the Operation of a Fixed-Time Signalization Scheme for a Four Leg Intersection in Ilorin Metropolis, Nigeria

Y. A. Jimoh ； O. O. Adeleke ； A. A. Afolabi

《Research Journal of Applied Sciences, Engineering and Technology》 4卷17期 (2012/09) Pp. 2839-2845

並列摘要

The study reports the assessment of the performance of the signalisation scheme at an urban intersection with the purpose of reviewing for better and effective management of the junction delays. Maraba intersection in Ilorin metropolis, Nigeria, is a 4-legged traffic warden controlled intersection in a typical urban centre of a developing economy with the traffic operating at LOS F at each of the legs. As a result of the congestion at the intersection and in a bid to ameliorate the frustration experienced by motorists at the intersection, a fixed-time traffic signalization was installed at the intersection to replace the manual traffic warden controlled signalization. It was however noticed that the congestion experienced at the intersection has become worse despite the introduction of the fixed-time signalization. A 4-phase fixed-time traffic signalization was therefore proposed to replace the present 5-phase signalization, which if implemented will improve the level of service to D. It was consequently recommended that to achieve the new level of service, the intersection should be redesigned by increasing the number of lanes from the existing 2 to 3 for two of the legs while the only approach with a single lane should be increased to 2 lanes.

並列關鍵字

Critical flow ratio ； fixed time signalization ； intersection congestion ； traffic warden controlled