Samenvatting
Single-lane roundabouts may face the problems of getting crowded and empty in their circulatory roadway and also of traffic safety due to a stream of pedestrians and/or cyclists. The paper presents the possible methodology of calculating the reduction of the roundabout capacity due to the pedestrians and/or cyclist stream, used in Slovenian roundabouts. The methodology of calculating the reduction of the roundabout capacity may be used in urban areas, where the strength of the cyclist or pedestrian streams is high.