1927 BPR announces the location of routes designated as part of the U.S. highway system. The Highway Users Federation for Safety and Mobility is formed by the consolidation of the Automotive Safety Foundation, the National Highway Users Conference, and the Auto Industries Highway Safety Committee. No highway projects may be approved in any State having a maximum speed limit over 55 m.p.h. The Act, part of a nationwide effort to save oil, is a result of an oil embargo imposed by the Organization of Petroleum Exporting Countries that forced Americans into long lines at gas stations. President Nixon estimates the new speed limit can save nearly 200,000 barrels of fuel a day.
Signs go up as the speed limit comes down.