Capacity and queue modelling in un-signalised roundabouts.

The performance of un-signallised roundabouts was evaluated, focusing on capacity and level of service (LOS) attributes. Capacity and LOS are traditionally evaluated at a macroscopic or a microscopic level. A new approachthat could be set on a median level between a macroscopic and a microscopic approach and could include both existing approaches was developed. It considered roundabouts as a succession of merging, weaving and diverging segments and allowed the estimation of capacity and delays. The model was applied to a roundabout near Treviso, Italy. It was able to quantify entry capacity and queue dynamics. For the covering entry of this conference please see ITRD E132365