Colleagues
Next week's CTS seminar at UCL will be given by
Dr Chikwong Wong
City University of Hong Kong
Wednesday 9 February 2011
16:00 Chadwick Lecture Theatre B05
Centre for Transport Studies
UCL
A new methodology for the optimisation of traffic signal settings
Abstract
Conventional optimisation methods for the design of traffic signal settings
require the lane
marking patterns, which are painted on ground showing road users the
permissible turning
directions on different approach lanes, as exogenous inputs to define the
traffic stream grouping
for analysis. This predefined grouping of traffic movements may restrict the
design of signal timings
in the optimisation procedures. More recently, a new design method has been
developed to relax
the lane markings as binary-type control variables in a mathematical
programming approach. The
lane marking patterns and the signal timings can then be optimised
simultaneously in an unified
framework. Further extensions are to relax the numbers of approach lane in
traffic arms as new
integer variables which can then be optimised to give optimal lane
arrangement in various arms
of a signal-controlled junction to serve the incoming traffic more
efficiently. All well-defined
signal timings variables in the phase- (group-) based approach as well as
the lane marking and
lane flow variables together with their governing constraints are all
preserved in the new formulation
for the reserve capacity optimisation of isolated signal-controlled
junctions. Numerical examples using
a 4-Arm junction are given to show the benefits and effectiveness of the new
methodology in dealing
with practical designs.
About the speaker
Chikwong Wong is currently a Lecturer in the Department of Building and
Construction at the
City University of Hong Kong. His research lies in developing advanced tools
for optimisation of
traffic management and control. Dr Wong received his BEng degree from the
Hong Kong
Polytechnic University, and his MPhil and PhD from the University of Hong
Kong. His research
topics include land-use and transportation modelling, and optimization
applied to traffic control.
Dr Wong has been a frequent visitor to the Centre for Transport Studies as
UCL since 2006.
We hope that you will be able to join us for this
Benjamin Heydecker
________________________________________________
Benjamin Heydecker
Professor of Transport Studies
Centre for Transport Studies
UCL
Tel: 020 7679 1553
Fax: 020 7679 3042
[log in to unmask]
________________________________________________
|