Reference
A. Hegyi, B. De Schutter, and J. Hellendoorn, "Optimal coordination of variable
speed limits to suppress shock waves,"
Transportation Research
Record, no. 1852, pp. 167-174, 2003.
Abstract
We present a model predictive control (MPC) approach to optimally coordinate
variable speed limits for highway traffic. A safety constraint is formulated
that prevents drivers from encountering speed limit drops larger than, say, 10
km/h, which is incorporated in the controller. The control objective is to
minimize the total time that vehicles spend in the network. This approach
results in dynamic speed limits that reduce or even eliminate shock waves. To
predict the evolution of the traffic flows in the network, which MPC requires,
we use an adapted version of the METANET model that takes the variable speed
limits into account. The performance of the discrete-valued and
safety-constrained controllers is compared with the performance of the
continuous-valued unconstrained controller. It is found that both types of
controllers result in a network with less congestion, a higher outflow, and
hence a lower total time spent. For our benchmark problem, the performance of
the discrete controller with safety constraints is comparable to the continuous
controller without constraints.
Publisher page
Downloads
Addendum
- A. Hegyi, B. De Schutter, and J. Hellendoorn, "Optimal coordination of variable speed limits to suppress shock waves - Addendum," Tech. report CSE02-015a, Control Systems Engineering, Fac. of Information Technology and Systems, Delft University of Technology, Delft, The Netherlands, 4 pp., Mar. 2003. (abstract, bibtex, report (pdf))
BibTeX
@article{HegDeS:02-015,
author = {Hegyi, Andreas and De Schutter, Bart and Hellendoorn, Johannes},
title = {Optimal Coordination of Variable Speed Limits to Suppress Shock
Waves},
journal = {Transportation Research Record},
number = {1852},
pages = {167--174},
year = {2003}
}