101 STAT. 140
23 USC 101 note.
PUBLIC LAW 100-17—APR. 2, 1987 Federal share of the cost of the withdrawn route or portion thereof bears to the Federal share of the total . cost of all interstate routes in that State as reflected in the latest cost estimate approved by the Congress. "(ii) EXCEPTION.—In any State where the withdrawal of an interstate route or portion thereof has been approved under this section prior to the date of the enactment of the Federal-Aid Highway Act of 1976, the ' unobligated apportionments for the Interstate System in that State on such date of enactment shall be reduced in the proportion that the Federal share of the cost to complete such route or portion thereof, as shown in the latest cost estimate approved by Congress prior to such approval of withdrawal, bears to the Federal share of the cost of all interstate routes in that State, as shown in such cost estimate; except that the amount of such proportional reduction shall be credited with the amount of any reduction in such State's Interstate apportionment which was attributable to the Federal share of any substitute project approved under this paragraph before such date of enactment. "(L) APPLICABILITY OF UMTA.— "(i) SUPPLEMENTARY FUNDS.—Funds available
49 USC app. 1601 note. 49 USC app. 1602.
for
expenditure to carry out the purposes of this paragraph shall be supplementary to and not in substitution for funds authorized and available for obligation pursuant to the Urban Mass Transportation Act of 1964. "(ii) LABOR PROTECTION.—The provisions of section
3(e)(4) of the Urban Mass Transportation Act of 1964 shall apply in carrying out this paragraph. "(M) LIMITATION ON INTERSTATE DESIGNATIONS.—After the
23 USC 101 note.
date of the enactment of the Federal-Aid Highway Act of 1978, the Secretary may not designate any mileage as part of the Interstate System pursuant to this paragraph or under any other provision of law. The preceding sentence shall not apply to a designation made under section 139 of this title. "(N) OPEN TO TRAFFIC REQUIREMENT.—After September
30, 1979, the Secretary shall not withdraw his approval under this paragraph of any route or portion thereof on the Interstate System open to traffic before the date of the proposed withdrawal. Any withdrawal of approval of any such route or portion thereof before September 30, 1979, is hereby determined to be authorized by this paragraph. "(O) LIMITATION ON SUBSTITUTION FOR STATUTORILY DESIGNATED ROUTES.—Any route or segment which was
statutorily designated after March 7, 1978, to be on the Interstate System shall not be eligible for withdrawal or substitution under this subsection. "(P) RIGHT-OF-WAY PAYBACK,—
"(i) ENFORCEMENT.—Of sums apportioned or allocated under this paragraph to a State, the Secretary shall not obligate for projects in such State an amount equal to the amount of Federal funds expended to purchase the right-of-way for any withdrawn route or portion thereof if the right-of-way is not first disposed
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