- imposed daylight saving time for all if 1974.
- imposed a national speed limit if 55 miles.
Back home, the fallout from the energy crisis continued to rain down for the embargo's duration. Fifteen states and the District Page 733 of Columbia instituted gas rationing, and in some places, service stations simply stopped selling gasoline. To encourage conservation, Congress introduced a national speed limit of 55 miles per hour on interstate highways and imposed daylight saving time for all of 1974. The same year, NASCAR reduced the distances of all auto races by 10 percent. Responding to powerful pressures from an agitated populace, Congress took more aggressive measures, passing a mandatory fuel allocation bill to press large U.S. oil companies to lower their prices and to force them to sell to independent refiners and distributors. Although it was not the only symptom of a global economic downturn, the energy crisis introduced those Americans who had known only growth and prosperity to the concept of a shortage.