A bill to amend title 23, United States Code, to provide for State establishment of maximum speed limits not in excess of 70 miles per hour for portions of public highways located outside of traffic-congested areas.

Amends the law regarding the maximum national speed limit to direct the Secretary of Transportation to disapprove State highway projects seeking Federal proportional contribution if the applicant State permits: (1) a maximum speed limit exceeding 55 miles per hour on any public highway portion lying within a traffic-congested area; (2) a maximum speed limit exceeding 70 miles per hour on any public highway portion lying outside a traffic-congested area; or (3) speed limits which are not uniformly applied to all motor vehicles on any other portion of public highway if such portion had a uniformly applicable speed limit on November 1, 1973.

Directs the Secretary to establish standards for the determination of traffic-congested areas within 180 days after enactment of this Act.