PROJECT ELIGIBILITY.

SEC. 138. PROJECT ELIGIBILITY. Section 108(b) of the Federal-Aid Highway Act of 1956 is amended by adding at the end thereof the following: “Notwithstanding the fifth sentence of this subsection, the costs of a project which will upgrade an interstate route and will complete a gap on the Interstate System providing access to an international airport and which was described as the preferred alternative in a final environmental impact statement submitted to the Secretary of Transportation on September 30, 1983, shall be eligible for funds authorized by this subsection as if such costs were included in the 1981 interstate cost estimate and shall be included as eligible costs in any future interstate cost estimate, except that (1) such costs may be further developed in the design and environmental process under normal Federal-aid interstate procedures, and (2) the amount of such costs shall not include the portion of the project between High Street and Causeway Street.”.