Modeling an Unconventional Intersection by Using Single-Point Urban Interchange with PTV.VISSIM

摘要

An intersection is a place where traffic congestion from each arm always happens. In Yogyakarta, one of intersections having the traffic congestion at peak hours is at Kentungan Intersection. The traffic congestion mostly occurs by high volume of vehicles exceeding the intersection capacity. Commonly, a type of this intersection is a plot of intersection. Thus, an evaluation from geometric views by changing the type of the intersection to an elevated intersection (interchange) is needed. The elevated intersection consists of conventional and unconventional intersection. The elevated conventional intersection is commonly applied in Indonesia like flyover or underpass. Hence, this study chose one of the unconventional intersections called Single-Point Urban Interchange (SPUI) because the SPUI could provide more vehicle flows and be more efficient than other types. This study aimed to propose the best model from some intersection conditions. A method of this study used PTV.VISSIM 9 software. This study modeled three conditions: existing condition, default and modified SPUI intersection. Based on the result of the existing models, Level of Service (LOS) was F with 104,79 seconds of vehicle delay average. In the model of default SPUI model, value of LOS was D with 32,54 seconds of vehicle delay average. Next, in the modified SPUI model, the LOS was D with 30,3 seconds of vehicle delay average. Therefore, based on the results, the modified SPUI can reduce 74,49 seconds of the delay.