December 25th morning, Dr. Zhiwei WANG was invited to visit the college, nanyang technological university in Singapore and in the main buildingof the new A716 titled “Dynamical AV routing allocation scheme with mixed traffic flow in the tolled network”academic report.Nearly 30 teachers and studentsattended the lecture.
Dr. Zhiwei WANG proposes a dynamical routing scheme of autonomous vehicles (AVs) in a mixed traffic condition consisting of conventional vehicles (CVs), uncontrolled AVsand controlled AVs in a tolled network. We adopt the general BRUE assumptionfor route choice of CVs and UE assumptions for route choice of uncontrolledAVs. The evolution of traffic flow is modelled in a day-to-day (DTD) framework.The proposed model is built in a general framework. Although travelers followdifferent routing principle, under general assumptions, the proposed scheme candrive the aggregated flow toward the desired flow pattern, which is the uniqueUE flow pattern with the implementation of a uniform toll pricing onuncontrolled travelers. In addition, the exemption of toll for the controlledAV users is the motivation for them to accept the route allocation with someroutes that are inferior in respect to travel time cost during the flowadjustment process. A rigorous stability analysis is presented and otherproperties of models are also discussed, such as the invariance of traffic flowtrajectories and the equivalence of the stationary states and equilibriumcondition for different group of flow and aggregated flow and rigorousmathematical proofs are given. For the purpose of practical application, aspecific model satisfying the general formulation is proposed and tested in twonumerical examples. The study provides some insights on how to utilize thecontrollable property of AVs and consider a method for AVs to accept moretime-consuming routes. Moreover, the general framework of the proposed model ismore flexible for the real application.
Dr. ZhiweiWANG's logical and simple presentation has benefited everyone.During the meeting, the teachersand students had an in-depth discussion with Dr. Zhiwei WANG on someperplexities of the study,and the report was successfully concluded in a warm atmosphere.
Speaker introduction：
Dr. Zhiwei WANGis an AssociateProfessor in the School of Civil and Environmental Engineeringat Nanyang Technological University (Singapore). He received his PhD from theDepartment of Civil & Environmental Engineering at Hong Kong University ofScience and Technology in 2008. His research topics include optimaltransportation infrastructure design, analyzing interaction between urbandevelopment and transportation planning, public transportation operation anddesign. He has published more than 45 articles on the top transportationjournals. He serves as an Associate Editor in the editorial board of TransportmetricaA: Transport Science. He is editorial board member of International Journal ofTransportation Science and Technology. As a Principle Investigator, Dr. Wanghas secured over S$2 million in external research grants since 2010. Themajority (about S$1.7 million) was awarded by highly competitive AcademicResearch Fund (AcRF) Tier 2 Research Grant by Ministry of Education (MOE) ofSingapore. He received Fred Burggraf Award from Transportation Research Board(TRB) of the National Research Councils of the United States in 2016; Tan ChinTuan Exchange Fellowship in Engineering at NTU in 2017.
