In 1969, a research-type, skid-test trailer was acquired, U.S. routes were surveyed in 1970 and 1971, and the interstate and toll-road systems were surveyed in 1971. The data were used for research purposes and have been reported. The interstate and toll-road systems were surveyed again for research purposes in 1974. Since October 1974, surveys have been performed under highway safety project grants (interaccounted to 108, subsection OSKID). Primary and principal secondary roads, involving 4,613 miles (7,427 km), were surveyed in 1975. A second skid tester, a survey-type, was acquired in April 1976; and survey-testing of major, rural collector roads continued during 1976. This included 5,074 miles (8,166 km) of state secondary roads and 788 miles (1,268 km) of rural secondary roads. In 1977, the interstate and toll-road systems were re-surveyed, and a total of 1,576 miles (2,537 km) of predominately rural secondary roads were tested. The 1977 survey data are reported.
Statewide Survey of Skid Resistances of Pavements
1978
156 pages
Report
Keine Angabe
Englisch
Statewide Survey of Skid Resistances of Pavements, 1978
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