Analysis of Traffic Performance Due to Railway Crossing Gate Closures at an Unsignalized Four-Leg Intersection in Malang City (Case Study: Ciliwung Street to Karya Timur Street)

Abstract

The unsignalized four-leg intersection at Jalan Ciliwung – Jalan Karya Timur in Malang frequently experiences severe congestion due to its role as a key corridor and interruptions from railway gate closures. This study evaluates the intersection’s operational performance and proposes improvements to enhance traffic flow. Using a descriptive quantitative method, data were collected across six sessions: Saturday morning/evening, Monday morning/evening, and Wednesday morning/evening, documenting traffic volume, queue lengths, and gate closure durations. Analysis followed the Indonesian Road Capacity Guidelines (PKJI 2023). Findings reveal that the degree of saturation exceeded PKJI thresholds (0.90–0.91), with mean delays of 15.63–15.89 s/vehicle, indicating poor performance. The optimal intervention—right-turn prohibition combined with road widening—reduced saturation to 0.78 and delay to 13.04 s/vehicle.