ANALYSIS OF GREEN TIME SEQUENCING AND OPTIMIZATION AT THE SIGNALIZED INTERSECTION OF JALAN W.R. SUPRATMAN–JALAN HASANUDDIN, TIMIKA CITY

Frederik Irsan Delu (Politeknik Amamapare)
Pebrinar Riani Sangle (Universitas Kristen Indonesia Paulus)
Monalisa Bumbungan (Universitas Kristen Indonesia Paulus)

Multidiciplinary Output Research for Actual and International Issue (Morfai Journal)
Vol. 6 No. 5 (2026): Multidiciplinary Output Research For Actual and International Issue

Traffic performance at signalized intersections is strongly influenced by road geometry, traffic volume, and signal timing, particularly in urban transportation systems that frequently experience congestion and signal violations. This study analyzes the relationship between traffic capacity (passenger car unit per hour) and green time, and evaluates the sequence and duration of green time at the signalized intersection of Jalan Hasanuddin and Jalan W.R. Supratman in Timika City, Central Papua Province, Indonesia. Although the intersection is equipped with a traffic light control system (APILL), red-light running violations still frequently occur and increase the potential for traffic accidents. Field data on traffic volume, geometric conditions, and signal timing were collected through direct observation and analyzed using the Indonesian Highway Capacity Manual (MKJI 1997), supported by a review of recent international literature on signalized intersection performance, mixed motorcycle traffic behavior, and traffic signal optimization. The analysis reveals a nonlinear quadratic relationship between traffic capacity and green time, expressed as y = 1.165x2 − 9.2824x + 19.137, with a coefficient of determination (R2) of 0.9098, indicating a high level of model fit. Green time requirements decrease as capacity increases up to an optimal point, while lower capacities require longer green time due to less stable traffic flow. These findings support volume-responsive green time allocation as a strategy to improve intersection performance and reduce red-light violations.