Modelling and Real-time Control of Traffic Flow on the Boulevard Peripherique in Paris

Abstract A macroscopic mathematical model of freeway traffic flow is applied to a 6 km-stretch of the Boulevard Peripherique in Paris including several on ramps and off-ramps. The model is validated on the basis of real traffic flow measurements selected under a broad spectrum of traffic conditions. A linearized version of the model is utilized for derivation of coordinated, feedback ramp metering strategies based on Linear Quadratic (LQ)-Optimisation theory . Efficiency of the presented strategy is tested by simulation means and compared to the no control case and to local control strategies. Nonlinear optimal control options are briefly discussed.