Reference
M. Hajiahmadi, R. Corthout, C. Tampère, B. De Schutter, and H.
Hellendoorn, "Variable speed limit control based on the extended link
transmission model,"
Transportation Research Record,
no. 2390, p. 11-19, 2013.
Abstract
In this paper the link transmission model (LTM) is extended to include the
effects of variable speed limit (VSL) and consequently to provide VSL control
for traffic networks modeled by the LTM. The LTM was recently developed for
route assignment, but in this study the LTM was modified to be used for control
purposes. This modification achieved a model that provides a balanced trade-off
between accuracy and computational complexity, and therefore the model is
useful for online model-based traffic control. Nevertheless the extension of
the model for ramp metering and speed limit control needed careful attention.
Because the LTM lacks explicit velocity equations, the focus was on other
potential sources that could imitate the influences of VSL. The delays inside
the model were manipulated to achieve the mentioned goal. Moreover, different
situations were taken into account that might occur in reality on the basis of
changes in VSL and different traffic conditions. Finally, the total extensions
were verified with simulation and real data. For that aim to be achieved, the
VSL extension integrated in the LTM was verified with simulations for a
benchmark case study (to show the performance of the extended LTM clearly).
Next, the LTM was calibrated by real data collected from the A12 freeway in the
Netherlands. The optimal parameters of the model were identified with a global
optimization method. Comparison with real data from a period of time when VSL
installed on the freeway was active showed the acceptable performance of the
total extended and calibrated LTM.
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BibTeX
@article{HajCor:13-020,
author = {Hajiahmadi, Mohammad and Corthout, Ruben and Tamp{\`{e}}re, Chris
and De Schutter, Bart and Hellendoorn, Hans},
title = {Variable Speed Limit Control Based on the Extended Link
Transmission Model},
journal = {Transportation Research Record},
number = {2390},
pages = {11-19},
year = {2013}
}