Reserve capacity of a signal-controlled network considering the effect ofphysical queuing.

Author(s)
Wong, C.K. Wong, S.C. & Lo, H.K.
Year
Abstract

Reserve capacity is a commonly used performance indicator for a signal-controlled system that can be obtained by maximizing a common flow multiplier. Transient overloading is very common in urban signal-controlled systemsin which the peak demand may last a very short period of time. The reserve capacity could be overestimated in conventional point queue modelling framework assuming infinite holding capacities along road links. More realistically, vehicles are able to be held up in the form of spatial queues andfully dissipated if sufficient green times are provided. To model the effect of physical queuing, a signalised cell transmission model is employed and a multi-phase signal optimization algorithm is integrated for determining the reserve capacity of a linked signal system. Starts of red and green times and their durations are key decision variables. The problem is formulated as a Binary-Mix-Integer-Linear-Program (BMILP) that can be solved by standard branch-and-bound routines. Optimization heuristics are also developed to speed up the solution process. A staggered junction with short link connections is given as a numerical example for illustration. For thecovering abstract see ITRD E144727. Reprinted with permission of Elsevier.

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Publication

Library number
C 48423 (In: C 48400) /73 / ITRD E144897
Source

In: Transportation and traffic theory 2007 : papers selected for presentation at the 17th International Symposium on Transportation and Traffic Theory (ISTTT17), held at the Institution of Mechanical Engineers, London, UK from July 23 - 25, 2007, p. 533-553, 21 ref.

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