Reference
A. Hegyi, B. De Schutter, and J. Hellendoorn, "Optimal coordination of variable
speed limits to suppress shock waves,"
IEEE Transactions on
Intelligent Transportation Systems, vol. 6, no. 1, pp. 102-112, Mar.
2005.
Abstract
When freeway traffic is dense, shock waves may appear. These shock waves
result in longer travel times and in sudden, large variations in the speeds of
the vehicles, which could lead to unsafe situations. Dynamic speed limits can
be used to eliminate or at least to reduce the effects of shock waves. However,
coordination of the variable speed limits is necessary in order to prevent the
occurrence of new shock waves and/or a negative impact on the traffic flows in
other locations. In this paper we present a model predictive control (MPC)
approach to optimally coordinate variable speed limits for freeway traffic with
the aim of suppressing shock waves. First, we optimize continuous valued speed
limits, such that the total travel time is minimal. Next, we include a safety
constraint that prevents drivers from encountering speed limit drops larger
than, e.g., 10 km/h. Furthermore, to get a better correspondence between the
computed and the applied control signals, we now consider discrete speed
limits. We illustrate our approach with a benchmark problem.
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BibTeX
@article{HegDeS:02-023,
author = {Hegyi, Andreas and De Schutter, Bart and Hellendoorn, Johannes},
title = {Optimal Coordination of Variable Speed Limits to Suppress Shock
Waves},
journal = {IEEE Transactions on Intelligent Transportation Systems},
volume = {6},
number = {1},
pages = {102--112},
month = mar,
year = {2005}
}