Resumen
The article sets forth basic provisions for evaluation of the level of service of thoroughfares required to solve the problems with traffic management related to the planning and control of transport and pedestrian flows, assessment of traffic condition, reconstruction of the street and road network. The level of service is hard to estimate due to numerous factors which affect traffic intensity and capacity. The article provides multiplicative power law models to determine the travel speed of vehicles on a road section and intervals between vehicles at an intersection which allow to evaluate the capacity of any section of the city street and road network with regard to the existing and predicted set of factors.