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Evaluating Signalized Roundabout Timing Performance: A Critic Method
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Abstract
En 中文
Traffic signals are the most widely used form of control for urban intersections, serving not only to regulate the right-of-way and protect conflictingvehicle movements,but also to allocate greentime, phases, and cycle lengths that influence overall traffic performance. Variations in signal timing directly affect vehicle delay, queue formation, and efficiency at intersections. In this study, the performance of the selected intersection was first examined under the existing signal timing plan. Four alternative signal timing scenarios were then developed and modelled using microscopic simulation to identify potential improvements. Intersection performance was evaluated based on five key operational indicators: queue length, average delay, number of stops, carbon monoxide (CO) emissions, and fuel consumption. The outcomes of each scenario were subsequently analysed using the CRITIC method to provide an objective ranking. Results revealed that all proposed scenarios improved the level of service (LOS) compared with the base case, with Scenario 2 emerging as the most effective alternative.
Keywords:
CRITIC method
Signalized intersection
VISSIM
delay
emission
fuel consumption
Journal
E
IF:
0.8
Papers:
20
Citations:
0