Room C2-301, Department of Engineering, Kobe University

Multi-gated perimeter traffic flow control of monocentric cities

– Date and time: 7th July, 10:40 – 12:10
– Speaker: Dr. Konstantinos Ampountolas, Glasgow University, UK
– Title: “Multi-gated perimeter traffic flow control of monocentric cities”
– Venue: Room C2-301, Department of Engineering, Kobe University.
Gating is a practical scheme to prevent monocentric cities from overload in the sense of limiting the traffic flow entrance to a number of controlled gates at the periphery, whenever the central district is close to overload. In this talk, we present a multigated perimeter traffic flow control scheme for monocentric cities. The proposed scheme determines optimally distributed input flows (or feasible entrance link green times) for a number of controlled gates located at the periphery of a protected monocentric city. A macroscopic model is employed to describe the traffic dynamics of the protected central district. To describe traffic dynamics outside of the protected area, we augment the basic state-space model with additional state variables to account for the queues at store-and-forward origin links at the periphery. We aim to equalise the relative queues at origin links and maintain the vehicle accumulation in the protected network around a desired point, while the system’s throughput is maximised. The perimeter traffic flow control problem is formulated as a convex optimisation problem with constrained control and state variables. For real-time control, the optimisation problem is embedded in a rolling-horizon control scheme using the current state of the whole system as the initial state as well as predicted demand flows at entrance links. A meticulous simulation study is carried out for a 2.5 square mile protected network area of San Francisco, CA, including fifteen gates of different geometric characteristics. Results demonstrate the efficiency of the proposed approach and its equity properties to better manage excessive queues outside of the protected network area and optimally distribute the input flows. It is expected that similar policies can also be utilised for dynamic road pricing.
Short Bio:
Dr Konstantinos Ampountolas is a Lecturer in Transport Engineering in the School of Engineering at the University of Glasgow, UK. He received the Dipl.-Eng. degree in Industrial Engineering and Management, and MSc, PhD degrees in Operations Research, all from the Technical University of Crete, Greece. Before to joining Glasgow, he was research fellow at École Polytechnique Fédérale de Lausanne, Switzerland, visiting research scholar at the University of California, Berkeley, and post-doctoral researcher at the Centre for Research and Technology Hellas, Greece. He was visiting professor at Technion – Israel Institute of Technology, Israel, and at Federal University of Santa Catarina, Brazil. His research interests include traffic flow modelling, simulation and management, and transport informatics. Dr Ampountolas serves on the Editorial Advisory Boards of Transportation Research Part C and Transportation Research Procedia. He is currently co-Investigator of the Urban Big Data Centre ( funded by the UK Economic and Social Research Council (ESRC).