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A field test of a grade severity rating system
Field test of a grade severity rating system (Online)
Erickson, Raymond C.
Colorado. Department of Highways.
United States. Federal Highway Administration.
Colorado Department of Highways
Raymond C. Erickson, Jr.
Prepared in cooperation with the Federal Highway Administration.
Includes bibliographical references.
Interim report. 1983-1985.
Print version record.
Traffic signs and signals
1 online resource (v, 15 numbered pages; 11 unnumbered pages) : illustrations