**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.

Online version of the paper

Corresponding technical report: pdf file (268 KB)

@article{HegDeS:02-015,

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

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

journal={Transportation Research Record},

number={1852},

pages={167--174},

year={2003},

doi={10.3141/1852-21}

}

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