Various macroscopic and microscopic road traffic models allow traffic flow analysis. However, it should be emphasised that standard traffic flow models do not include drivers’ behaviour. Thus, we propose a multi-agent microscopic model for analysing the roundabout traffic flow considering the various types of agents. Agents have parameters characterising their style of acceleration and braking, as well as the distance to the vehicle in front. The simulation studies show that these parameters are crucial in roundabout road traffic analysis. To accurately reflect the acquired dimensions of the cars, a small-cell cellular automaton (CA) was used, where one car is represented as a set of CA cells.