Agreat number of models have been made for roundabouts capacity modelling. The author has briefly presented the development history of models that passed verification through field tests. The model selected for capacity modelling of roundabouts in Osijek is more precisely described. Modelling results have been presented, analysed and compared with the experience gained in other countries. The results of capacity modelling for the single-line roundabout are within expected values, whereas for the double-line are not.