Federal-Aid Highway Amendments of 1974

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The Federal-Aid Highway Amendments of 1974 was signed into law by President of the United States Gerald Ford on January 4, 1975.[1] Among other changes, the law permanently implemented a national 55-mph speed limit (which had already been a temporary limit) for the Interstate Highway System. It also established the Federal Bridge Gross Weight Formula as law, which governed the weight-to-length ratio of trucks in order to protect highway bridges and infrastructure.

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  1. ^ "A Chronology of Dates Significant in the Background, History and Development of the Department of Transportation". U.S. Department of Transportation. October 3, 2008. Archived from the original on February 15, 2008. Retrieved 2009-03-09.