SIGNAL CONTROL OF A ROUNDABOUT WITH LIGHT RAILWAY TRANSPORTATION OPERATION (CASE STUDY: PHUKET LIGHT RAILWAY TRANSIT, SURIN CLOCK TOWER)
Keywords:LRT, at-grade intersection, actuated traffic signal, roundabout
An at-grade light rail project has been initiated in Phuket, Thailand. The line runs through the city streets with several signalized intersections and large roundabouts. The study aims to explore traffic control strategies in order to provide transit progression while minimizing delays in other vehicles. A software package, TRANSYT, was used to establish the optimized signal timing and coordination. VISSIM, a microscopic simulation software package, was also employed to simulate and evaluate the efficiency measures to recommend the best scenario. The test scenarios included 1) unsignalized control without light railway transit (LRT),
2) unsignalized control with yield, 3) unsignalized street vehicle control with actuated signal control for LRT, 4) fixed time signal and 5) signalized street vehicle control with transit actuated signal. The best traffic control scheme was found to be unsignalized street vehicle control with actuated signal control for LRT due to its short queue length and low average street delay.
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