Roundabouts in the United States

Manylion Llyfryddiaeth
Awduron Corfforaethol:	National Research Council (U.S.). Transportation Research Board, United States. Federal Highway Administration, American Association of State Highway and Transportation Officials
Awduron Eraill:	Rodegerdts, Lee
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Washington, D.C. Transportation Research Board 2007.
Cyfres:	Report (National Cooperative Highway Research Program) 572.
Pynciau:	Traffic circles > United States > Design and construction. Roads > United States > Interchanges and intersections > Design and construction.
Mynediad Ar-lein:	Table of contents only OCLC Digital Archive