"Traffic management problems are very challenging, especially in large and complex intersections which are under reconstruction. In this paper we evaluate the impact of the traffic reconfiguration for a complex urban intersection from Nancy France. We begin by constructing a mesoscopic simulation model using a discrete event simulation tool, FlexSim, followed by an optimization method based on evolutionary algorithms. The modeling goal is to eliminate traffic congestion caused by the undergoing modifications of the intersection, and propose an appropriate fire plan, which would adapt to a future reconfiguration. Our modeling and optimization methods which were tested in 2013 over four different configurations of the input data flow, are now being compared to recent results, in terms of blocking and average stay-times inside the modified intersection."