A bill to apportion certain funds for construction of the National System of Interstate and Defense Highways for fiscal years 1985 and 1986, and for other purposes.

Directs the Secretary of Transportation to apportion for expenditure on the National System of Interstate and Defense Highways: (1) one-half of the sums authorized to be appropriated in accordance with the interstate cost estimate for FY 1985; and (2) the sums authorized to be appropriated in accordance with the interstate cost estimate for FY 1986.

Directs the Secretary to apportion: (1) one-half of the sums to be apportioned for FY 1984 for expenditure on substitute highway and public mass transit projects; and (2) the sums to be apportioned for FY 1985 for expenditure on substitute highway and public mass transit projects.

Specifies apportionment factors.