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The National Maximum Speed Law (NMSL) in the United States was a provision of the Federal 1974 Emergency Highway Energy Conservation Act that prohibited speed limits higher than . It was drafted in response to oil price spikes and supply disruptions during the 1973 oil crisis. While Federal officials hoped gasoline consumption would fall by 2.2%, actual savings were estimated at between 0.5% and 1%. The law was widely disregarded by motorists, and most states opposed the law. Actions ranged from proposing deals for exemption to de-emphasizing speed limit enforcement. The NMSL was modified in 1987 and 1988 to allow up to limits on certain limited access, rural roads. Congress repealed the NMSL in 1995, fully returning speed limit setting authority to the states. The law's safety benefit is disputed as research found conflicting results. ==History== Historically, the power to set speed limits belonged to the states. Immediately before the National Maximum Speed Law became effective, speed limits were as high as . (Kansas had lowered its turnpike speed limit from 80 before 1974.) Montana and Nevada generally posted no numeric speed limit on rural roads. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「National Maximum Speed Law」の詳細全文を読む スポンサード リンク
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