Relationship between Vehicle Stream in the Circular Roadway of a One-Lane Roundabout and Traffic Volume on the Roundabout at Peak Hour

One-lane roundabouts are popular mainly due to high traffic capacity and the opportunities for ensuring a high level of road traffic safety to the users. Furthermore, they have been very often used as an effective means of reducing the traffic. This paper presents the analysis of relationships of a one-lane roundabout on the main factors that determine its value, such as total traffic volume that unloads the intersection at a particular external diameter of the roundabout. The effect of the study is development of a nomogram of traffic capacity for one-lane roundabouts.