Highways and Related Transportation Systems Improvement Act

[AI summary unavailable — showing source text] Highways and Related Transportation Systems Improvement Act - Sets forth findings that highway congestion, air pollution, and related safety problems are impairing the efficiency of the highway system; and declares that the level of efficiency can be improved by developing related systems, and that both highways and related systems can best be improved by giving States and local communities greater flexibility in the use of Federal Highway funds. Revises the present authorizations of $4,000,000,000 for the Interstate System of Highways to $3,250,000,000 for each of the fiscal years 1974, 1975, 1976, 1977, 1978, and 1979. Authorizes the Secretary of Transportation to make 1974 and 1975 Interstate System apportionments using the factors set forth in Table 5 of House Public Works Committee Print 92-29. Extends the time for completing the Interstate System by three years, from June 1976 to June 1979. Requires the Secretary to continue to report to Congress the cost of completing the Interstate System every second year, using the estimate shown therein for making apportionments for the subsequent two-year-period, upon approval of Congress. Authorizes additional mileage for the Interstat…