Pengaruh hambatan samping terhadap kinerja ruas Jalan Lempuyangan, Yogyakarta

Abstract

Lempuyangan Street is an important access to Lempuyangan Station. In addition, this road also connects traffic from the north (East Krasak Street, Yos Sudarso Street) to various directions, namely the south (Tukanan Street, Hayam Wuruk Street), west (Gang Widuri Street, Gang Widoro Street), and east (Argo Lubang Street, Wahidin Sudirohusodo Street). This road accommodates traffic loads from both directions. The Lempuyangan Road Survey collected primary data such as road geometry, vehicle volume and speed, and side obstacles. These data were analyzed using MKJI 1997 to evaluate road performance in existing conditions and with side obstacles, and to analyze the effect of side obstacles on road capacity. The Lempuyangan Road section's performance, analyzed using the 1997 MKJI method, reveals significant traffic challenges during peak hours. With a total traffic volume of 1161.2 smp/hour against a capacity of 1957 smp/hour, the road experiences an average travel speed of just 5.51 km/hour, far below the free flow speed of 44.09 km/hour, resulting in a degree of saturation (DS) of 0.59. This places the road's service level predominantly at Class D (DS 0.59, average speed 9.57 km/hour), though it can reach Class C (DS 0.39, average speed 14.44 km/hour) and even Class B (DS 0.13, average speed 19.45 km/hour) under less congested conditions. Critically, side obstacles are the most significant factor impacting capacity, causing a reduction of 943 smp/hour. Proposed solutions include road widening and, to mitigate side obstacles, enforcing illegal parking bans, relocating parking areas, and implementing e-ticketing for vehicles driving against traffic.