90 STAT. 432
49 USC 1603.
PUBLIC LAW 94-280—MAY 5, 1976 this title, if he determines that such route or portion thereof is not essential to completion of a unified and connected Interstate System and if he receives assurances that the State does not intend to construct a toll road in the traffic corridor which would be served by the route or portion thereof. When the Secretary withdraws his approval under this paragraph, a sum equal to the Federal share of the cost to complete the withdrawn route or portion thereof, as that cost is included in the latest Interstate System cost estimate approved by Congress, subject to increase or decrease, as determined by the Secretary based on changes in construction costs of the withdrawn route or portion thereof as of the date of enactment of the Federal-Aid Highway Act of 1976 or the date of approval of each substitute project under this paragraph, whichever is later, and in accordance with the design of the route or portion thereof that is the basis of the latest cost estimate, shall be available to the Secretary to incur obligations for the Federal share of either public mass transit projects involving the construction of fixed rail facilities or the purchase of passenger equipment including rolling stock, for any mode of mass transit, or both, or projects authorized under any highway assistance program under section 103 of this title; or both, which will serve the urbanized area and the connecting nonurbanized area corridor from which the Interstate route or portion thereof was withdrawn, which are selected by the responsible local officials of the urbanized area or area to be served, and which are submitted by the Governor of the State in which the withdrawn route was located. Approval by the Secretary of the plans, specifications, and estimates for a substitute project shall be deemed to be a contractual obligation of the Federal Government. The Federal share of the substitute projects shall be determined in accordance with the provisions of section 120 of this title applicable to the highway program of which the substitute project is a part, except that in the case of mass transit projects, the Federal share shall be that specified in section 4 of the Urban Mass Transportation Act of 1964, as amended. The sums available for obligation shall remain available until obligated. The sums obligated for mass transit projects shall become part of, and be administered through, the Urban Mass Transportation Fund. There are authorized to be appropriated for liquidation of the obligations incurred under this paragraph such sums as may be necessary out of the general fund of the Treasury. Unobligated apportionments for the Interstate System in any State where a withdrawal is approved under this paragraph shall, on the date of such approval, be reduced in the proportion that the 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. In any State where the withdrawal of an Interstate route or portion thereof has been approved under section 108(e)(4) of this title prior to the date of enactment of the FederalAid Highway Act of 1976, the unobligated apportionments for the Interstate System in that State on the date of enactment of the Federal-Aid Highway Act of 1976 shall be reduced in the pro}3ortion that the Federal share of the cost to complete such route or portion thereof, as shown on 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 on 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 prior to enactment of such Federal-Aid Highway Act. Funds available for expenditure to carry
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