A bill to amend title 23, United States Code, to insure that no State will be apportioned less than 80 percent of its tax contribution to the highway trust fund.

Directs the Secretary of the Treasury to determine for each fiscal year the amount of taxes attributable to each State which are paid into the Highway Trust Fund during such fiscal year and to make such adjustments in the apportionments authorized as may be necessary to insure that no State shall be apportioned an aggregate amount for any fiscal year which is less than 80 percent of the amount of taxes attributable to such State and paid into the Highway Trust Fund during the preceding fiscal year.