**Reference:**

A. Hegyi,
B. De Schutter, and
J. Hellendoorn,
"Optimal coordination of variable speed limits to suppress shock
waves," *Proceedings of the 7th TRAIL Congress 2002 - TRAILblazing
into the Future - Selected Papers* (P.H.L. Bovy, ed.), Rotterdam,
The Netherlands, pp. 197-220, Nov. 2002.

**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 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 eliminate shock waves. For the prediction of the
evolution of the traffic flows in the network, which is needed for
MPC, 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 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.

Corresponding technical report: pdf file (291 KB)

@inproceedings{HegDeS:02-013,

author={A. Hegyi and B. {De Schutter} and J. Hellendoorn},

title={Optimal coordination of variable speed limits to suppress shock waves},

booktitle={Proceedings of the 7th TRAIL Congress 2002 -- TRAILblazing into the Future -- Selected Papers},

editor={P.H.L. Bovy},

address={Rotterdam, The Netherlands},

pages={197--220},

month=nov,

year={2002}

}

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