报告摘要: Traffic signal timing optimization usually assumes that the layout of a junction including lane markings is given as exogenous input. Based on the lane markings, traffic engineers usually start with grouping the traffic lanes into traffic streams, irrespective of the traffic conditions, and then signal settings are determined using stage-based or group-based methods. However, in reality, traffic may not distribute in the same pattern as the ideal grouping based solely on the lane markings, especially under an unbalanced flow distribution. Recently, the lane-based optimization method has recently been developed to address this challenge, in which lane markings are represented by binary variables in the optimization framework for the design of signal-controlled junctions. In this seminar, two extensions of the lane-based method for multi-period analysis and area traffic control are presented. For multi-period analysis, we assume traffic demand pattern varies at different times of the day, and the lane-based optimization method can produce a unique set of lane markings with different signal timings for different periods, which helps to provide a robust control to account for different demand patterns at the junction. For area traffic control, we extend the lane-based optimization method to a traffic equilibrium network, in which we formulate a decomposition approach to simultaneously optimize the lane markings and signal settings for the signal-controlled network.

报告人信息: Professor S.C. Wong is Chair Professor and Head of the Department of Civil Engineering at the University of Hong Kong. He received his BSc(Eng) and MPhil degrees from the University of Hong Kong and a PhD in Transport Studies from University College London. He is currently Editor-in-Chief of Transportmetrica A: Transport Science, and International Journal of Sustainable Transportation, and serves on the editorial boards of other eighteen journals, including IEEE Transactions on Intelligent Transportation Systems, Transportation Research Part B, Accident Analysis and Prevention, etc. Professor Wong has published extensively in reputable international journals with high impact factors. He has published more than 260 papers in refereed journals, in addition to numerous conference papers and presentations, including 50 keynote and invited talks. His journal articles have attracted more than 3,000 citations, garnering him an h-index of 29 according to the ISI Web of Science. Since 1995, he has been awarded more than HK$12M by the Hong Kong Research Grants Council (including 16 projects from its General Research Fund scheme) and other sources in his capacity as principal investigator. He served on four international committees: Network Modeling Committee and Committee on Traffic Flow Theory and Characteristics of the Transportation Research Board; Committee of Application of Advanced Technologies in Transportation of the American Society of Civil Engineers; and International Scientific Committee of the Eastern Asian Society for Transportation Studies. Locally, Professor Wong is currently a Justice of the Peace, and a member of the Town Planning Board and Vice-Chairman of its Rural and New Town Planning Committee (and former Vice-Chairman of its Metro Planning Committee), and was also a member of the Transport Advisory Committee, Road Safety Council, and Harbour-front Enhancement Committee of the HKSAR Government. He is currently the Vice-President of Hong Kong Society for Transportation Studies, and was President of the Chartered Institute of Logistics and Transport in Hong Kong, Chairman of the Chartered Institution of Highways and Transportation (Hong Kong Branch).