Performance analysis of roundabouts at Bandar Maharani Bandar Di Raja, Johor, Malaysia

Abstract

Roundabout is one of road facilities that has been used to intentionally reduce the speed as well as conflicting points among vehicles. Therefore, roundabout is a safer option for an intersection and may also increase capacity and smoothness of traffic flow. The aim of this study was to determine the level of service of three main roundabouts in Bandar Maharani Bandar Di Raja, Muar namely roundabout of Jalan Bakri, roundabout of Jalan Sulaiman and roundabout of Jalan Abdul Rahman. Hence, the traffic pattern was identified by analyzing the commuter data at Jalan Khalidi. In this study, 12-hour of manual counting was carried out manually and then, the turning movements at roundabouts was determined by using videotaping method via drone. The flying and recording durations were 20 and 15 minutes, respectively. Data were extracted from the video to obtain flow rate using the derivation of peak hour factor formula. The traffic pattern analysis showed that the morning peak 15-minute were at 7.00 to 7.15 a.m. These 15-minute times were used to obtain flow rates of movements at roundabout through a simple peak hour factor analysis for determination of level of service. In the performance analysis, the overall level of service of Jalan Bakri /Jalan Sulaiman/Jalan Abdul Rahman roundabouts during morning and evening peak hour were D/F/E and B/F/F, respectively. In `the contrary, as expected, the level of service of these three roundabouts during off-peak hour were A, D and A. These outcomes are expected to be benefited by the Majlis Perbandaran Muar for better traffic management of Bandar Maharani.