Roundabout Geometric Design Guidance
This report examines geometric standards, guidelines, and practices, both on a state level and a national level), for developing recommendations on roundabout design guidance for California. The research involved assessing the operational performance of various California roundabouts and developing calibrated capacity models that are consistent with recent national research. A calibrated intersection sight distance model was also developed. Pedestrian and bicycle behavior at existing California roundabouts was examined, and their performance was compared to national observation. Finally, a range of recommendations on geometric design parameters were developed, including vehicle speeds, design vehicle, inscribed circle diameter, and issues related to roundabouts with more than four legs, roundabouts at freeway interchange terminals, and roundabouts in high-speed environments.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/309871344
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Corporate Authors:
California Department of Transportation
Division of Research and Innovation
1227 O Street, MS-83
Sacramento, CA United States 94273-0001University of Nevada, Reno
Department of Civil and Environmental Engineering
Reno, NV United States 89557 -
Authors:
- Tian, Zong Z
- Xu, Feng
- Rodegerdts, Lee A
- Scarbrough, Wade E
- Ray, Brian L
- Bishop, William E
- Ferrara, Thomas C
- Mam, Sannow
- Publication Date: 2007-6
Language
- English
Media Info
- Media Type: Print
- Edition: Final Report
- Features: Appendices; Bibliography; Figures; References; Tables;
- Pagination: 81p
Subject/Index Terms
- TRT Terms: Bicycles; Geometric design; Highway capacity; Pedestrians; Roundabouts; Traffic speed
- Geographic Terms: California
- Subject Areas: Design; Highways; Operations and Traffic Management; I73: Traffic Control;
Filing Info
- Accession Number: 01125494
- Record Type: Publication
- Source Agency: UC Berkeley Transportation Library
- Report/Paper Numbers: F/CA/RI-2006/13
- Contract Numbers: 65A0229
- Files: CALTRANS, TRIS, STATEDOT
- Created Date: Mar 30 2009 1:36PM