**Reference:**

J.R.D. Frejo,
A. Núñez,
B. De Schutter, and
E.F. Camacho,
"Model predictive control for freeway traffic using discrete speed
limit signals," *Proceedings of the 2013 European Control
Conference*, Zürich, Switzerland, pp. 4033-4038, July 2013.

**Abstract:**

A model predictive control (MPC) approach for freeway traffic control
using discrete signals for the activation of variable speed limit
panels is proposed. The discrete characteristics of the panels and
some necessary constraints for their real operation are usually
underestimated in the literature, so first we propose a way to include
them using the macroscopic traffic model METANET within an MPC
framework. For obtaining practical discrete signals, the MPC
controller has to solve a highly non-linear optimization problem,
including mixed-integer variables. Since solving such a problem is
complex and difficult to execute in real-time, we propose some methods
to obtain reasonable control actions in a limited computation time.
The methods consist of first relaxing the discrete constraints for the
inputs; and then, based on this continuous solution and together with
different search methods, to find discrete speed limit signals that
provide the best performance, keeping the number of simulations
reduced. The proposed methods are tested by simulation, showing not
only a good performance but also keeping the computational time
reduced.

Corresponding technical report: pdf file (156 KB)

@inproceedings{FreNun:13-021,

author={J.R.D. Frejo and A. N{\'{u}}{\~{n}}ez and B. {D}e Schutter and E.F. Camacho},

title={Model predictive control for freeway traffic using discrete speed limit signals},

booktitle={Proceedings of the 2013 European Control Conference},

address={Z\"urich, Switzerland},

pages={4033--4038},

month=jul,

year={2013}

}

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