Reference
M. Hajiahmadi, R. Corthout, C. Tampère, B. De Schutter, and J.
Hellendoorn, "Variable speed limit control based on the extended link
transmission model,"
Proceedings of the 92nd Annual Meeting of
the Transportation Research Board, Washington, DC, 15 pp., Jan. 2013.
Paper 13-0409.
Abstract
In this paper, the link transmission model (LTM) is extended to include the
effects of variable speed limits (VSL) and consequently to provide variable
speed limit control for traffic networks modeled by LTM. The LTM has recently
been developed for route assignment, but in this paper the LTM is modified to
be used for control purposes. By this we achieve a model that provides a
balanced trade-off between accuracy and computational complexity, and hence it
is useful for on-line model-based traffic control. Nevertheless, the extension
of the model for ramp metering and speed limit control needs careful attention.
Since the LTM lacks explicit velocity equations focus is on other potential
sources that could imitate the influences of VSL. The delays inside the model
are manipulated in order to achieve the mentioned goal. Moreover, we take into
account different situations that may occur in reality based on changes in VSL
and different traffic conditions. Finally, the total extensions are verified
using simulation and real data. To this aim, the VSL extension integrated in
the LTM is verified using simulations for a benchmark case study (in order to
show performance of the extended LTM clearly). Next, the LTM is calibrated by
real data collected from the A12 Freeway in The Netherlands. The optimal
parameters of the model are identified using a global optimization method.
Comparison with real data from a period of time that VSL installed on the
freeway are active, shows acceptable performance of the total extended and
calibrated LTM.
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BibTeX
@inproceedings{HajCor:12-040,
author = {Hajiahmadi, Mohammad and Corthout, Ruben and Tamp{\`{e}}re,
Chris and De Schutter, Bart and Hellendoorn, Johannes},
title = {Variable Speed Limit Control Based on the Extended Link
Transmission Model},
booktitle = {Proceedings of the 92nd Annual Meeting of the Transportation
Research Board},
address = {Washington, DC},
month = jan,
year = {2013},
note = {Paper 13-0409}
}