Roundabouts emerging as the ideal intersection - 0 views
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Ihering Alcoforado on 08 Apr 12Roundabouts emerging as the ideal intersection February 6, 2012 University of Wisconsin-Madison e-Mail Print MADISON, WIS. - They've become the subject of myriad YouTube "how-to" videos. Entire department of transportation websites explain how to navigate them. And, they elicit more than a little anxiety and confusion in the minds of drivers entering, circling and exiting them. Yet, roundabouts are rapidly cropping up in locales ranging from city streets to rural intersections and Interstate off-ramps. In essence, they are the "next big thing" in roadway intersections. Roundabouts provide drivers an efficient, safer alternative to traditional four-way intersections governed by stop signs or traffic signals, says David Noyce, a University of Wisconsin-Madison professor of civil and environmental engineering. An expert in transportation safety, Noyce directs the Wisconsin Traffic Operations and Safety (TOPS) Laboratory at UW-Madison. "In typical traffic engineering, there's a tradeoff between safety and operations. Generally, 'safe' equals 'inefficient,'" he says. "Our research has shown roundabouts offer benefits in both of these." TOPS researchers have studied not only roundabout safety and "operations," but also the inner workings of seven software packages transportation engineers use to design roundabouts. They already have presented their findings as testimony at a legislative hearing in Wisconsin and at international transportation research conferences. From Jan. 22 through 26, they discussed their roundabouts research in Washington, D.C., at the Transportation Research Board annual meeting, which draws more than 11,000 transportation professionals from around the world. At the national and international levels, their research not only can improve roundabout design software, but also inform traffic engineers' decisions related to how to design roundabouts and where to construct them. In Wisconsin, drivers can encounter a