To reduce the amount of obligation authority available to certain States for Federal-aid highways and highway safety construction programs for fiscal year 1991 if the laws of those States do not provide for the establishment of a dedicated tax-based source of revenues for funding mass transit projects by January 1, 1992, and for other purposes.

[AI summary unavailable — showing source text] Requires the Secretary of Transportation to reduce by 25 percent the aggregate amount which a mass transit State may obligate for Federal-aid highways and highway safety construction programs for FY 1991 if by October 1, 1990, laws of such State do not authorize: (1) a general tax-based source of revenue to take effect by January 1, 1992, for paying the non-Federal share of projects for mass transportation eligible for assistance under the Urban Mass Transportation Act of 1964; or (2) the establishment of regional or local tax-based sources of revenues to pay such non-Federal share or to pay operating expenses of mass transit service which satisfy financial capacity standards. Authorizes the Secretary to restore any reductions in obligation authority made to a mass transit State in FY 1991 if such State complies with this Act by July 1, 1991.…