Freeway guide sign replacement policies and criteria - McGee, Hugh W.; American Association of State Highway and Transportation Officials; United States. Federal Highway Administration (Washington, D.C. Transportation Research Board, National Research Council, 1991)
"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."
"April 1991."
Includes bibliographical references (p. 30-31).
Keywords: Traffic signs and signals -- Maintenance and repair