The Centre for Transport Studies is pleased to welcome
Ms Valentina Trozzi (Centre for Transport Studies, Imperial College London)
to lead a seminar entitled
Dynamic Shortest Hyperpath search in congested networks
to be held
Wednesday 25th May 2011 – 16.00
Please join us for presentation and discussion at
Room 601, Skempton Building, Imperial College London
(Maps and travel directions: www.imperial.ac.uk/cts/html/Miscellaneous/travelDirections.asp<http://www.imperial.ac.uk/cts/html/Miscellaneous/travelDirections.asp>)
Abstract
A dynamic route choice model is presented to be embedded in transit assignment.
The major assumptions made are that, due to lack of service information passengers do not know exact vehicle arrival times at any stop, furthermore at each stop several competing lines can be boarded in order to reach the destination. In this context, the rational travel behaviour requires to select for each bus stop a bunch of competitive lines (attractive set) which are convenient to board and board the first line that actually becomes available. This route choice model which is commonly known as best travel strategy or shortest hyperpath has been studied in the static context since late eighties (Nguyen Pallottino, 1988. Spiess and Florian, 1989). The new challenge addressed by this research is the extension of the shortest hyperpath search to the dynamic and congested scenario, where travel variables such as travel times and frequencies vary with the time wise during day, also because of vehicles’ capacity constraints passengers cannot always board the first vehicle approaching the stop which means they have to queue until the service actually become available.
About the Speaker
Ms Valentina Trozzi is a PhD Candidate at Imperial College London – Centre for Transport Studies. Her research focus is on the extension of dynamic hyperpath search in congested transport networks with formation and dispersion of passengers queues at transit stops. Valentina completed her undergraduate in Rome University “La Sapienza” (2005), where she also got her MSc in Transportation Engineering (2007), as well as a post-graduate master degree on Urban Environment (2009). After a short, but intense experience in industry as a Transport Planner, in 2009 she moved to London, where she started her PhD supervised by Prof Michael Bell.
Imperial’s next CTS Seminar
Mr John Cartledge (Safety Policy Adviser, Passenger Focus) will be leading a seminar titled “Public Perceptions of Rail Safety in Britain” on Wednesday 8 June 2011 at 16:00.
About the CTS Seminar Series
The CTS seminar series aims to facilitate discussion on current research topics in the transport field. Seminars are held jointly with our colleagues in the Centre for Transport Studies at University College London. They are usually held on Wednesday afternoons at Imperial College London or University College London. Seminars are free of charge and open to all interested parties. Booking is not required.
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CTS home: www.imperial.ac.uk/cts<http://www.imperial.ac.uk/cts>
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