Capacity of Small Roundabouts with Two-Lane Entries

Roundabouts have been a popular system for intersections outside downtown 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.

• Record URL:
  • https://doi.org/10.3141/1988-17
• 
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Capacity+of+Small+Roundabouts+with+Two-Lane+Entries&author=H.+Lindenmann&publication_year=2006
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309099986
• Authors:
  • Lindenmann, H P
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 119-126
• Monograph Title: Highway Capacity and Quality of Service 2006
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 1988
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Behavior; Highway capacity; Highway safety; Roundabouts; Traffic flow; Urban areas
• Geographic Terms: Switzerland
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 01042127
• Record Type: Publication
• ISBN: 0309099986
• Files: TRIS, TRB, ATRI
• Created Date: Feb 13 2007 12:21PM