A signal optimization model for roundabout was control concept were used to eliminate the conflict points proposed based on dual-ring scheme and two stop lines for left turns and weaving sections at a roundabout. A cy...A signal optimization model for roundabout was control concept were used to eliminate the conflict points proposed based on dual-ring scheme and two stop lines for left turns and weaving sections at a roundabout. A cycle length minimization problem was considered to generate optimal signal timings for roundabout, and a set of constraints to ensure feasibility and safety of the resulting optimal signal settings were proposed. Extensive experimental analyses in comparison with signalized intersection reveal that the proposed model is quite promising for application in design of roundabout signals, and the minimum cycle length can decrease from 186 s to 79 s while the capacity increases from 8 682 pcu/h to 9 011 pcu/h under high demand scenario. Sensitivity analysis with respect to the system performance show that the lane assignment plan, number of circulatory lanes and left turn ratio are three critical factors which have dominate impacts on performance of signalized roundabout展开更多
This paper describes signalized roundabouts with GPSS and developa simulation model to assess the traffic performance of the signalizedroundabout and its capacity. Average delay and stop frequency are used to analyze ...This paper describes signalized roundabouts with GPSS and developa simulation model to assess the traffic performance of the signalizedroundabout and its capacity. Average delay and stop frequency are used to analyze a few signal control strategies. A real small roundabout which is assumed to be signalizedis simulated by this model. The results is inclined to show thatsignalizing theN small round about would not be a good traffic control strategy.展开更多
基金Project(51178345) supported by the National Natural Science Foundation of ChinaProject(2011AA110305) supported by the National High Technology Research and Development Program of ChinaProject supported by the Program for Young Excellent Talents in Tongji University, China
文摘A signal optimization model for roundabout was control concept were used to eliminate the conflict points proposed based on dual-ring scheme and two stop lines for left turns and weaving sections at a roundabout. A cycle length minimization problem was considered to generate optimal signal timings for roundabout, and a set of constraints to ensure feasibility and safety of the resulting optimal signal settings were proposed. Extensive experimental analyses in comparison with signalized intersection reveal that the proposed model is quite promising for application in design of roundabout signals, and the minimum cycle length can decrease from 186 s to 79 s while the capacity increases from 8 682 pcu/h to 9 011 pcu/h under high demand scenario. Sensitivity analysis with respect to the system performance show that the lane assignment plan, number of circulatory lanes and left turn ratio are three critical factors which have dominate impacts on performance of signalized roundabout
文摘This paper describes signalized roundabouts with GPSS and developa simulation model to assess the traffic performance of the signalizedroundabout and its capacity. Average delay and stop frequency are used to analyze a few signal control strategies. A real small roundabout which is assumed to be signalizedis simulated by this model. The results is inclined to show thatsignalizing theN small round about would not be a good traffic control strategy.
