Evaluation and Improvement of an Unsignalized Intersection Performance at Bangi City, Malaysia

Sahar A. Ali Dawood

Abstract: Traffic congestion and long queues at intersections during peak hour are the major problems in the cities. Growing numbers of road users lead to increasing of traveling times. This study focused at an unsignalized roundabout intersection in Bangi city.This intersection have heavy traffic flow at peak hour (8am, 5pm) because of it is connected to the road leading to University Kabangsaan Malaysia (UKM).Data collected manually (traffic volume, speed travel, No. of lane, width lane ?etc). AASIDRA program used for data analysis, finding problem, suggest suitable solutions and its cost. After data analysis we find that the intersection have bad level of service(F), more delay, high degree of saturation, high stop rate.We suggest adding one lane and slip for all approach.This solution is active and the problem of intersection reduced (Delay, Stop rate, Degree of saturation).

Keywords: Unsignalized Intersection, Roundabout ,Traffic Flow, AASIDRA Program ,Bangi,Malaysia