Citation

Lindenmann HP. Transp. Res. Rec. 2006; 1988: 119-126.

Affiliation

Institute for Transport Planning and Systems, Swiss Federal Institute of Technology, CH-8093 Zurich, Switzerland

Copyright

(Copyright © 2006, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Roundabouts have been a popular system for intersections outside down-town zones in urban areas in Switzerland for more than 10 years. One form of small roundabout becoming more common in Switzerland is the system with short two-lane approaches and a single-lane extrawide circulatory roadway. Research shows that small roundabouts with two-lane entries with a single-lane extrawide circulatory roadway have capacities 20% to 30% higher than those with single-lane entries, although the space requirements are almost identical. The fact that roundabouts with two-lane entries and a single-lane extrawide circulatory roadway have shown good performance with respect to capacity, traffic flow, and driver behavior, as well as a high level of safety, has led to an increasing use of this type of roundabout in Switzerland.

Language: en