The primary objective of this study is to evaluate the effects of intervention startup threshold in Variable Speed Limits (VSL) system for improving traffic safety and identify the optimal startup threshold. The micro-simulation software PARAMICS was selected and applied to conduct the evaluating tests of different strategies. Crash potential was used as the crash prediction method to evaluate the real-time traffic safety, and five levels of intervention startup threshold were tested for their effects on traffic safety and operation efficiency. The results have shown that the VSL system can significantly improve traffic safety on roadways. The startup threshold level with high intervention frequency was the best startup threshold. Compared to non-control strategy, it can reduce the crash potential by 50% with a marginal increase in travel time, 0.3%. The findings proposed in this paper provide important and helpful information for determining the optimal control strategy of Variable Speed Limits.
Evaluating the Control Strategies of Variable Speed Limits in PARAMICS: Determining the Optimal Intervention Startup Threshold
11th International Conference of Chinese Transportation Professionals (ICCTP) ; 2011 ; Nanjing, China
ICCTP 2011 ; 1611-1619
2011-07-26
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
British Library Conference Proceedings | 2006
|Traffic Simulation with Paramics
Springer Verlag | 2010
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IET Digital Library Archive | 1995
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