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Seminar
Department
of Systems Engineering and Engineering Management
The Chinese
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Title |
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Modeling the Use of
Public Transport in Evacuations |
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Speaker |
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Prof. Mark Hickman |
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Department of Civil Engineering and Engineering Mechanics |
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Date |
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May 18th, 2007 (Friday) |
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Time |
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4:30 p.m. - 5:30 p.m. |
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Venue |
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Room 513 |
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William M.W. Mong Engineering Building |
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(Engineering Building Complex Phase 2) |
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CUHK |
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Abstract:
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Recent events have highlighted the role that public
transport can play in responding to major emergencies, particularly in the During such events, the primary need is to evacuate
persons from the area near the emergency to designated safe locations. In
this presentation, we investigate two critical aspects of emergency evacuation:
the location of evacuation sites for the carless
population, and the dynamic routing of public buses to evacuate these people.
The first problem is to determine the location of evacuation sites where
persons may congregate to be picked up by transit vehicles. In our
decomposition, the selection of evacuation sites is completed a priori,
before any emergency. This selection of evacuation sites is formulated as a
capacitated facility location problem, which can be solved using existing
heuristic methods. By considering the time of day and day of week of the
emergency, the model identifies the evacuation sites and gives the expected
number of evacuees that need public transit service at each site. The second problem is to route the public transit vehicles
to pick up evacuees at these sites and to transport them to safe locations.
The objective of the problem depends on the nature of the emergency: in some
cases, the objective will be to maximize the number of people evacuated in a
given time window; in other cases, the objective will be to minimize the
total time to complete the evacuation. Some buses may be available for the
evacuation from a depot, and others may be already in service. We may also
have real-time information on the locations and remaining capacities of
vehicles in service, and/or real-time information on the travel times in the
road network. With this information, the goal is to route the set of vehicles
through the network to evacuate people from the evacuation sites to
designated safe locations. The routing strategies are adaptive and sensitive
to several characteristics: the time at which the emergency occurs, the
condition of the road network, and the number of people that need to be
evacuated at each evacuation site. We formulate this problem as a dynamic
vehicle routing problem, and discuss possible heuristic methods for its
solution. We will also discuss possible extensions of this problem, in which
the demand at each evacuation site is stochastic. |
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Biography:
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Dr. Mark Hickman is an associate professor in
transportation engineering within the Department of Civil Engineering and
Engineering Mechanics at the At the |
************************* ALL ARE WELCOME ************************
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Host |
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Prof. Janny Leung |
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Tel |
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(852) 2609-8238 |
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Email |
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Enquiries |
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Bolin Ding or Jeffrey Xu Yu |
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Department of Systems Engineering and Engineering
Management |
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CUHK |
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Website |
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Email |
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seg5810@se.cuhk.edu.hk |
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