AUTOMATIC CONTROL ALGORITHM FOR VMS AND SIGNAL COORDINATION IN URBAN TRAFFIC NETWORK Abstract: A feedback control algorithm for Variable Message Sign (VMS) of Urban Network

A feedback control algorithm for Variable Message Sign (VMS) of Urban Network is proposed. And traffic signal coordination with VMS is explicitly considered in the proposed VMS control algorithm. It is generally true that feedback control approach requires low computational effort and is less sensitive to model’s inaccuracy and disturbance uncertainties. Several issues in VMS control are raised and a feedback control algorithm is designed by incorporating the issues. To evaluate probable control benefit and detect logical errors of the proposed feedback algorithm, offline simulation test will be performed using real network in Daejeon, Korea. This research result is expected to upgrade the present VMS control practice and finally enhance the efficiency of network by achieving better traffic allocation.