Ramachandran BalakrishnaHaris N. KoutsopoulosMoshe Ben-AkivaBruno M. Fernandez Ruiz...
p.90-98页
查看更多>>摘要：Traveler information has the potential to reduce travel times and improve their reliability. Studies have verified that driver overreaction from the dissemination of information can be eliminated through prediction-based route guidance that uses short-term forecasts of network state. Critical off-line tests of advanced dynamic traffic assignment-based prediction systems have been limited, since the system being evaluated has also been used as the test bed. This paper outlines a detailed simulation-based laboratory for the objective and independent evaluation of advanced traveler information systems, a laboratory with the flexibility to analyze the impacts of various design parameters and modeling errors on the quality of the generated guidance. MITSIMLab, a system for the evaluation of advanced traffic management systems, is integrated with Dynamic Network Assignment for the Management of Information to Travelers (DynaMIT), a simulation-based decision support system designed to generate prediction-based route guidance. Evaluation criteria and requirements for the closed-loop integration of MITSIMLab and DynaMIT are discussed. Detailed case studies demonstrating the evaluation methodology and sensitivity of DynaMIT's guidance are presented.
查看更多>>摘要：The Bosporus Bridge in Istanbul, Turkey, is the first of the two highway crossings connecting Asia and Europe over the Bosporus Strait. Drivers must pay their toll in the Europe-to-Asia direction at a toll plaza comprising 15 lanes. Manual and electronic payment methods are available in the plaza. The analysis of data showed that several factors affect both the throughput of the plaza and the traffic flows approaching it. Among the factors were whether a particular toll lane was in service, the contraflow lane operation toward the plaza, the lane operators' performance, and the queue lengths in the plaza area. Rescaled cumulative vehicle count curves were used as the analysis tool. This allowed observation of (a) flow changes at particular points along the section of the highway studied and (b) propagation of the kinematic waves upstream of the plaza. The observations could be used for improving the performance of the plaza and for traffic management decisions associated with the afternoon peak period.
R. T. van KatwijkP. van KoningsbruggenB. De SchutterJ. Hellendoorn...
p.108-115页
查看更多>>摘要：A test bed for multiagent control systems in road traffic management is presented. As the complexity of traffic control on a network grows, it becomes more difficult to coordinate the actions of the large number of heterogeneous traffic management instruments that are available in the network. One way of handling this complexity is to divide the coordination problem into smaller coherent subproblems that can be solved with a minimum of interaction. Multiagent systems can aid in the distribution of the problem (over the various agents that compose the multiagent system) and facilitate the coordination of the activities of these agents when required. In the literature, no consensus exists about the best configuration of the traffic-managing multiagent system and how the activities of the agents that compose the multiagent system should be coordinated. The decomposition of a problem into various subproblems is an active field of research in the world of distributed artificial intelligence. A survey of approaches reported in the literature is presented. Subsequently, both the test bed and the modules that compose it are introduced. Finally, an application is presented that illustrates some of the research the test bed has made possible.
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