In the capacity analysis of roundabouts, correctly determining of the degree of saturation and control delay is of the highest importance, because these parameters are the main indicators of traffic flow quality. This paper briefly describes models of compute control delay on roundabouts that are currently most widely used in practice, such as: HCM, Akcelik, Brilon. In conclusion, will be recommended the guidelines for calibration process of these methods.

roundabout; control delay; calibration