Considering Overtaking, Common Lines and Non-Uniform Passenger Arrivals in the Bus Bunching Problem

                 Department of Systems Engineering and Engineering Management
                              The Chinese University of Hong Kong
Date: Tuesday, December 16, 2014 - 11:00am - 12:00am 
Speaker: Professor Ronghui Liu, Institute for Transport Studies (ITS), University of Leeds, United Kingdom
Title: Considering Overtaking, Common Lines and Non-Uniform Passenger Arrivals in the Bus Bunching Problem
Bus bunching is a regular feature in urban public transport systems. The problem was first analytically described by Newell and Potts (1964, Proceedings of 2nd Australian Road Research Board) for a single line, and there has since been a large body of literature on developing (real-time) control mechanisms in order to reduce bunching.  This talk presents a bus propagation model based on Dynamic Programming. The model overcomes some of the limitations in earlier work, notably the lack of consideration on bus overtaking, common lines and random arrivals of passengers. The model is applied to evaluate network design problems, with a focus on the design of common line stops. The talk will present some initial findings on the complex interplays between the behavioural and control assumptions (e.g. on passenger arrivals, and bus overtaking) and the network design features (on common line stops), and their impact on bus performance and passenger delays.
Dr. Liu obtained her B.Sc. from Peking University and her PhD  from Cambridge University. Her main research lies in developing computer micro-simulation models in transport studies, to analyse the dynamic and complex travel behaviour and traffic interactions in transport networks. She developed the DRACULA micro-simulation suite of models (  which has been a unique tool for developing blue-sky research and testing new ideas. Her research areas span a number of themes in the field of transport studies, in  traffic flow analysis and travel behaviour modelling, in ICT and Intelligent mobility; and in public transport operations and reliability analysis.  She is particularly interested in the interrelationships between these themes, and methodologies for estimation, design and evaluation of their network-wide effects. Her work has been widely published in international peer-reviewed journals (see recent publication below), and has been support by the European Commission, Volvo Research Foundation, UK Research Council, Department for Transport, Highways Agency, Transport for London, the First Group, as well as transport consultancies and local authorities.
Everyone is welcome to attend the talk!
Venue: Room 513, William M.W. Mong Engineering Building (ERB), The Chinese University of Hong Kong.
The talk will be hosted by:
Prof. Janny Leung,
Department of Systems Engineering and Engineering Management,
The Chinese University of Hong Kong,
SEEM-5201 Website:
Tuesday, December 16, 2014 - 03:00 to 04:00