A scientific approach to assessing the quality of the organization of traffic in large cities requires use of new methods and the most advanced information technologies. Developing the mathematical apparatus and software for modeling traffic flows allows a systematic approach to the analysis of effectiveness of measures to improve traffic management.This scientific article finds the answer to creating an original methodology for assessing the quality of traffic management on the basis of the parameters of mesoscopic models and theories of qualimetry in the conditions of high load of the street and road networks in large cities.