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Summary: Traffic Flow Characteristics Comparison between Modern
Roundabouts and Intersections
Sabyasachee Mishra
Graduate Student
Department of Civil and Environmental Engineering
Wayne State University
Detroit, MI 48202
Ph: (313) 577-3803
Fax: (313) 577-3881
E-mail: hisabya@wayne.edu
ITE Student Paper
March 9, 2009
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INTRODUCTION
There has been a strong interest expressed in modern roundabouts in the United States, Europe,
and Australia in recent years. While their space requirements are higher, modern roundabouts if
properly designed, are expected to provide better operating condition compared to conventional
intersections for certain traffic flow conditions. A number of cities in the US, including those in
the Detroit metro area, have converted traditional intersections to roundabouts. Because of
increased interest in roundabouts, there is continuing research effort at the U.S. Department of
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