Presented in this paper are SOUT and FLEXSYT simulation models in use for rail traffic quality analysis. The SOUT model is a macro-model based on an idea of optimal intensity of traffic. Results of SOUT simulations for Poznañ Railway Knot show influence of traffic organisation on capacity, influence of high traffic intensity on traffic quality, and a need for peak periods' rail traffic investigations. Result of simulations done on the FLEXSYT micro-model show advantages and perils of intelligent traffic management. They include junctions with high intensity of traffic, tram priority, and coordination. A comparison and contrast between simulation results and practical implementations leads to conclusions about proper design process and high requirements of intelligent traffic management.