Text of Public Law 93-643, the Federal-Aid Highway Amendments of 1974.
Text of Public Law 93-87, the Federal-Aid Highway Act of 1973.
Text of Public Law 91-605, the Federal-Aid Highway Act of 1970.
Text of Public Law 90-495, the Federal-Aid Highway Act of 1968.
Text of Public Law 90-238, which authorized an additional 200 miles of Interstate highway route construction in 1968.
Text of Public Law 89-574, the Federal-Aid Highway Act of 1966.
Text of Public Law 88-157, the Federal-Aid Highway Amendments of 1963.
Text of Public Law 87-61, the Federal-Aid Highway Act of 1961.
Text of Public Law 86-657, the Federal-Aid Highway Act of 1960.
Text of Public Law 86-342, the Federal-Aid Highway Act of 1959, title II of which increased federal motor fuels taxes from 3 cents per gallon to 4 cents on a temporary basis.
Text of Public Law 85-767, which collected all existing road, highway and bridge laws on the federal books prior to August 1958, organized them, and enacted them into positive law as title 23, United States…
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