PUBLIC LAW 97-424—JAN. 6, 1983
96 STAT. 2129
als conserve energy and reduce the cost of resurfacing or restoring our highways. (b) The Secretary of Transportation is hereby authorized for each of the fiscal years through September 30, 1985, to increase the Federal share as provided in sections 119, 120, and 144 of title 23, United States Code, by 5 per centum of any project submitted by the State highway departments which contains in the plans, specifications, and estimates submitted pursuant to section 106, of title 23, United States Code, the use of the materials described in subsection (a). To be eligible for such supplemental Federal assistance, significant amounts of asphalt additives or recycled materials must be used in each project approved by the Secretary. (c) The Secretary shall establish a procedure within ninety days of the date of enactment of this Act for increasing the Federal share under this section. ENFORCEMENT OF HEAVY VEHICLE USE TAX
SEC. 143. (a) Section 141 of title 23, United States Code, is amended by adding subsection (d) as follows: "(d) The Secretary shall reduce the State's apportionment of Federal-aid highway funds under section 104(b)(5) of this title in an amount up to 25 per centum of the amount to be apportioned in any fiscal year beginning after September 30, 1984, during which heavy vehicles, subject to the use tax imposed by section 4481 of the Internal Revenue Code of 1954, may be lawfully registered in the State without having presented proof of payment, in such form as may be prescribed by the Secretary of the Treasury, of the use tax imposed by section 4481 of such Code. Amounts withheld from apportionment to a State under this subsection shall be apportioned to the other States pursuant to the formulas of section 104(b)(5) of this title and shall be available in the same manner and to the same extent as other Interstate funds apportioned at the same time to other States.".
26 USC 4481.
MONITORING OF EFFECT OF DOUBLE BOTTOM TRUCKS
SEC. 144. (a) The Secretary of Transportation shall undertake to enter into appropriate arrangements with the National Academy of sciences to monitor the effects on the National System of Interstate and Defense Highways of the use of trucks with two trailing units, in light of the amendments made by this Act providing that no State shall prohibit the use of such vehicle combinations. Such monitoring shall include, but need not be limited to, determining the effects of the use of such vehicle combinations on highways and highway safety in urban and rural areas and in different regions of the country, taking into account differences in age and design features of highways on the Interstate System. (b) The Secretary of Transportation shall request the National Academy of Sciences to submit a report to the Secretary and the Congress of such monitoring, not later than two years after appropriate arrangements are entered into under subsection (a). The Secretary shall furnish to the Academy, at its request, any information which the Academy deems necessary for the purpose of conducting such monitoring.
49 USC 2315 con-
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