Performance analysis of Patal – Pusri Intersection after underpass operated

Abstract The high level of population growth can have an impact on increasing traffic growth, especially at intersection points. One of the intersections in Palembang is the Patal-Pusri intersection which has been equipped with an underpass to overcome the level of congestion that occurs at the intersection. The purpose of this study was to analyze the performance of the Patal-Pusri intersection after the underpass was operation. The analyze was conducted by calculating the cycle time, capacity and level of service the existing traffic flow and do an evaluation the comparison of the level of service at the beginning of the underpass operation in 2015 with current conditions. the traffic survey was conducted at 3 busy times, namely 06.00 - 08.00 WIB, 11.00 - 13.00 WIB and 16.00 - 18.00 WIB. Data were analyzed using the guidelines for the Indonesian Signalized Intersection Road Capacity Manual (1997). The results of the calculation of the cycle time obtained by 141 seconds, the intersection capacity of 3390 pcu/hour and the largest volume of traffic flow is 3142 pcu/hour. Analysis level of service of 0.909 (Level E) which means very bad. Whereas level of service at the beginning of the underpass operation was at level A which means very good, this shows that occurrence the decline in level of service from level A to level E within 4 years.