Integrated management of transportation by bi-level optimization

Integration of two different problems for the traffic management through hierarchical organization is presented. The problems are defined according to different physical models of the transportation flows: store-and- forward model and continuity of flows. The integration of these two optimization problems is performed by bi-level optimization. The benefit of this new formalization of the traffic management comes from the extended set of control parameters: the green light duration and the cycle of the traffic lights. Numerical experiments demonstrate improvements by minimization of the vehicles queue lengths and maximization of the outflow of arterial area in Sofia.