Effect of Traffic Volume Towards Operating Speed Approaching Terowong Meru

Abstract

The rising number of accidents has been associated with inconsistencies in the geometric design of highways. To evaluate design inconsistency, estimation of reduction in 85th percentile speeds is vital important. Therefore, to enhance the safety of the road it is crucial to produce road design that permits and encourages operating vehicles at uniform speed. This study was conducted at Terowong Meru located in Perak which is the South Bound of the expressway. Data collection was done at two sessions, the first session was between 12.30 p.m. until 1.30p.m. and the second session were conducted between 1.35p.m. until 2.35p.m. This research investigates and expands the use of operating speeds of vehicles influenced by the traffic volume when approaching the tunnel. From the analysis, it is found that the operating speed for Lane 1 has exceed the posted speed limit while the operating speed on Lane 2 is within the posted speed limit. The minimum speed or 15th percentile is also analysed in this study.