Federal Aid Highway Authorizations Act of 1981

[AI summary unavailable — showing source text] Federal Aid Highway Authorizations Act of 1981 - Amends the Federal-Aid Highway Act of 1956 to revise the authorization of appropriations for fiscal years 1983 through 1990 for the Interstate Highway System. Directs the Secretary of Transportation to apportion, for fiscal years 1983 and 1984, the sums authorized to be appropriated for expenditures on the National System of Interstate and Defense Highways according to specified factors. Authorizes appropriations out of the Highway Trust Fund for fiscal years 1982 through 1986 for: (1) the Federal-aid primary system; (2) the Federal-aid rural program; (3) the Federal-aid urban program; (4) forest highways; (5) public lands highways; (6) bridge replacement and rehabilitation; and (7) highway safety improvements. Prohibits any State from receiving less than one-half of one percent of the total apportionment for the Interstate System for each of fiscal years 1983 through 1987. Revises apportionments for the highway bridge replacement and rehabilitation program. Amends the Highway Safety Act of 1978 to limit, to fiscal year 1981, the authorization of appropriations for: (1) highway safety programs; (2) bridge reconstruction and replaceme…