Roundabouts in the United States - Rodegerdts, Lee.; National Research Council (U.S.). Transportation Research Board; United States. Federal Highway Administration; American Association of State Highway and Transportation Officials (Washington, D.C. Transportation Research Board, 2007)
"Research sponsored by the American Association of State Highway and Transporation Officials in cooperation with the Federal Highway Administration."
Includes bibliographical references (p. 113-114).
Keywords: Traffic circles -- United States -- Design and construction; Roads -- United States -- Interchanges and intersections -- Design and construction