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A Simulation Analysis on the Existence of Network Traffic Flow Equilibria

机译:网络流量均衡的存在性仿真分析

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摘要

A macroscopic fundamental diagram (MFD) can be applied to design simple and effective traffic network control strategies to prevent congestion in an urban traffic network. Network flow equilibria on MFDs are important properties for designing effective network controllers for urban traffic networks. In order to verify the existence of equilibria on MFDs, microscopic simulations are run for an urban traffic network with various network input traffic flows and traffic-signal control strategies. The simulation results show that the traffic network can reach its network flow equilibria if the traffic flows in the network are in the linear region (the free-flow region) of the MFD, although the network flows are heterogeneous; however, network flow equilibria do not exist for the nonlinear region (the non-free-flow region) of the MFD unless the traffic network flows are homogeneous. Properly designed traffic-signal control strategies can improve the degree of traffic flow homogeneity; thus, network flow equilibria are easy to be achieved under a bounded network input flow.
机译:宏观基本图(MFD)可用于设计简单有效的交通网络控制策略,以防止城市交通网络中的拥堵。 MFD上的网络流量平衡是设计用于城市交通网络的有效网络控制器的重要属性。为了验证MFD上是否存在平衡,针对具有各种网络输入交通流量和交通信号控制策略的城市交通网络运行了微观模拟。仿真结果表明,尽管网络中的流量是异构的,但如果网络中的流量在MFD的线性区域(自由流区域)中,则流量网络可以达到其网络流量平衡。但是,除非流量网络流量均匀,否则MFD的非线性区域(非自由流量区域)不存在网络流量均衡。设计合理的交通信号控制策略可以提高交通流的同质化程度。因此,在有界网络输入流下,网络流量平衡很容易实现。

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