ONLINE OFFSET OPTIMISATION IN URBAN NETWORKS BASED ON CELL TRANSMISSION MODEL

SUMMARY This study presents a heuristic approach for online offset optimisation in road networks. Traffic flow is modelled using the cell-transmission model (CTM), which is a discrete approximation to the hydrodynamic model of traffic flow. The optimisation employs a Genetic Algorithm (GA) and is applied to a two-way urban road with 3 signalized intersection and to a realistic small network with 6 signalized intersections. This paper presents the theoretical formulation of the traffic model and the optimisation algorithm, shows up figures on performance measures in terms of travel time savings, and addresses computational issues like CPU-time.