A control scheme for variable direction signs using dynamic reference values

This paper presents an approach to use dynamic reference values together with state estimations for applying a classical feedback control scheme for rerouteing decisions in motorway networks. Within this scheme a rerouteing algorithm is designed using different approaches from linear and nonlinear control theory. A section about the test field shows the practical requirements for the algorithms when applied in a field trial. The efficiency of this approach is underlined by simulation results applying a macroscopic traffic flow model and an OD estimation algorithm to a real motorway topology. Data from loop detectors of the test site are used to bring the simulated scenarios close to reality.