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Laem Chabang Port plays a crucial role as the main import and export hub in Thailand. The growth of the port and surrounding industrial estates has led to traffic issues in the area, particularly frequent traffic jams at Gates 3 and 4 entrances during peak periods. Large trucks must navigate intersections with various vehicles. At present, a fixed traffic light pattern is in use. Container trucks need to stop, even when the volume in the other direction is low. This results in the traffic signal cycles being unrelated to the vehicle volume at each intersection, particularly during peak traffic periods, leading to delays and queue accumulation. After reviewing the results, the researcher developed a solution for analyzing and optimizing traffic light timing. This involves applying synchronized traffic signals alongside a truck queuing system before entering the inspection gate. The analysis is conducted using the Simulation of Urban Mobility software (version 1.14.1) to model traffic scenarios at the microscopic level. Focused on the intersections at Inspection Gates 3 and 4 at Laem Chabang Port, Chonburi Province, the findings recommend improving the traffic signal at Gate 3 through Queue Storage Capacity. This approach yields the following results: 1) a 3.9% reduction in the average queue length at the intersection, and 2) an 11.84% decrease in the average queue length at the inspection gate. As for Gate 4, the traffic light should be improved using a Short Cycle Length and Pooled queuing management system, resulting in the following outcomes: 1) a 36.77% reduction in the average length of queues at intersections, and 2) a 91.51% decrease in the average queue length. The research findings can assist traffic agencies in establishing appropriate traffic light standards for Laem Chabang Port and other locations.
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