Traffic modelling and simulation is an increasingly used and effective tool for analyzing a wide variety of dynamical problems which are not suitable for study by other means. This research paper presents a real application for the urban area, more precisely in Brasov city, where there was noticed some problems in the urban traffic: congestions, conflict points. The data collected for one of the busiest arterial streets of the city has represented the input data for the modelling and simulation program Synchro plus Simtraffic 6. A new solution was proposed based on the analysis of the main influences of road geometry, signalisation and traffic conditions.