United States Department of Transportation
i
Implementation, driver behavior, and simulation : issues related to roundabouts in northern New England.
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2014-06-01
[PDF-1.46 MB]
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Abstract:Roundabouts are an emerging type of intersection design and a relatively new addition to the
transportation system in the United States. This imposes two traffic engineering and research
related issues. First, data and research on traffic operations and driver behavior at roundabouts
are limited. Although beginning to expand in recent years, the knowledge of roundabout
operations has been primarily based on data collected abroad where roundabouts are more
common. Moreover, capacity and operational models are inadequate since they are derived
primarily from concepts of existing stop-controlled and signalized intersections. Second, some
motorists are not as accustomed to the new driving patterns associated with a roundabout. This
affects traffic operations, especially at newly constructed roundabouts, but can also impact public
acceptance of roundabouts which may result in part from the lack of exposure and driver
confusion. This research is intended to address these issues and fill the following gaps in current
knowledge for roundabouts in the United States: factors affecting public acceptance; real world
roundabout operations data; and model methodology to adequately assess roundabout
performance.
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