The process of road network planning and designing in urban areas can be significantly improved by using microsimulation of traffic models. Traffic microsimulations are used for analyses and estimation of new proposals as well as for the reconstruction of existing infrastructure in order to reach optimum solution for defined problem. In this paper, applications of different analyses approaches are analyzed in two case studies. Both case studies are located in the city of Rijeka but in different parts of the city, in different traffic conditions and in circumstances where different changes in traffic network are planned. In both cases new solutions were tested through VISSIM traffic model and by application of SIDRA Intersection methodology. VISSIM is a stochastic, discrete, micro-simulation model designed for traffic analyses while SIDRA Intersection is a lane-based micro-analytical model. The results proved the suitability as well as advantages and disadvantages of both approaches. The paper contains suggestions for optimal application of selected models regarding different traffic problems.

road traffic microsimulation, urban traffic, SIDRA Intersection, VISSIM traffic model