Adjustment of Driver Behavior to an Urban Multi-Lane Roundabout
In the summer of 2006, the city of Springfield, Oregon installed the first urban multi-lane roundabout in the state. It was hypothesized that after installation, speed variability on approaches to the intersection would decrease from the values with the previous signalized intersection. It was also hypothesized that the initially observed high incidence of driving errors associated with specific areas of the roundabout would decrease over time. Before and after speed recordings of approach roads to the intersection revealed a significant increase in mean speed, but no consistent change in speed variability. Some design features caused initial confusion amongst drivers negotiating the roundabout, but the number of observed incidences of confused behavior declined over the first six months of operation at a rate that fit a classic logarithmic learning curve.
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Corporate Authors:
Oregon Department of Transportation
Research Section, 200 Hawthorne Avenue, SE, Suite B-240
Salem, OR United States 97301-5192Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Joerger, Mark
- Publication Date: 2007-5
Language
- English
Media Info
- Media Type: Print
- Edition: Final Report
- Features: Appendices; Figures;
- Pagination: 26p
Subject/Index Terms
- TRT Terms: Before and after studies; Behavior; Driver errors; Roundabouts; Traffic flow; Traffic speed
- Uncontrolled Terms: Mean speed; Multilane roundabouts; Speed variability
- Geographic Terms: Springfield (Oregon)
- Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control;
Filing Info
- Accession Number: 01049666
- Record Type: Publication
- Report/Paper Numbers: FHWA-OR-RD-07-09
- Contract Numbers: SPR 041
- Files: NTL, TRIS, ATRI, USDOT, STATEDOT
- Created Date: May 23 2007 10:49AM