Intersection performance evaluation and designing intersection at concourse between arterial road and ramp of Medan-Kualanamu-Tebing Tinggi Highway

摘要

In overcoming congestion problems that occur in Medan-Tebing Tinggi route,especially at certain points such as at Pasar Bengkel and Kayu Besar intersection during peak hours,an infrastructure has been built in,that is a highway which connecting Medan-Kualanamu-Tebing Tinggi.Medan-Kualanamu-Tebing Tinggi highway(MKTT)will connect Medan City and Tebing Tinggi City,so that drivers from Medan who will go to Tebing Tinggi will not pass through the main road that is prone to congestion.There is an intersection that connects arterial roads with each MKTT toll gate.At the intersection,there is a conflict between flows from the opposite direction and intersecting,resulting in delays and queues along the intersection arm.The conflict occured because of the lack of designing of the intersection that drains the flow of vehicles from ramp to arterial road or vice versa.This needs consideration because of the congestion causes queues and delays,especially during peak hours and holidays,so that it requires intersection performance analysis at concourse between arterial road and ramp of Medan-Kualanamu-Tebing Tinggi highway and design the geometric of intersection which appropriate with this intersection.From the results of the evaluation analysis,obtained degree of saturation at the intersection of the arterial road and the ramp of Lubuk Pakam toll road at 0.71 with level of service C that is still feasible to be used,so there is no need to change the intersection geometry.While for Sei Rampah,the degree of intersection saturation is 0.79 with the level of service D,which means that it is not feasible,requiring a change in the geometry of the intersection with a signalized roundabout.With the planned roundabout geometry,the degree of saturation is 0.5 which means it is feasible to use.