Transportation systems modelling as planning, organisation and management for solutions created with ITS

The principal models used in traffic analyses and forecasting in transportation system are reviewed in the paper. Further on, with the perspective of continuing growth of motoring and of the mobility of citizens, a necessity of using ITS solutions as well as of traffic modelling is pointed out to be a consistent approach to the problem of congestion in the cities and agglomerations. An example is given of traffic disturbance leading to obstructions and dangerous incidents at a local site with capacity limitation located within in an intra-node weaving section in Katowice (Upper-Silesian Agglomeration in Poland).