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|sections amended= |leghisturl= |introducedin= House |introducedbill= |introducedby= George Fallon (D–MD) |introduceddate= April 19, 1956 |committees= |passedbody1= House |passeddate1= April 27, 1956 |passedvote1= (388–19 ) |passedbody2= Senate |passedas2= |passeddate2= May 29, 1956 |passedvote2= (41–39 ) |conferencedate= June 22, 1956 |passedbody3= House |passeddate3= June 22, 1956 |passedvote3= adopted |agreedbody3= |agreeddate3= |agreedvote3= |agreedbody4= |agreeddate4= |agreedvote4= |passedbody4= Senate |passeddate4= June 22, 1956 |passedvote4= (89–1 ) |signedpresident= Dwight Eisenhower |signeddate= June 29, 1956 |unsignedpresident= |unsigneddate= |vetoedpresident= |vetoeddate= |overriddenbody1= |overriddendate1= |overriddenvote1= |overriddenbody2= |overriddendate2= |overriddenvote2= |amendments= |SCOTUS cases= }} The Federal-Aid Highway Act of 1956, popularly known as the National Interstate and Defense Highways Act (Public Law 84-627), was enacted on June 29, 1956, when President Dwight D. Eisenhower signed the bill into law. With an original authorization of US$25 billion for the construction of 41,000 miles (66,000 km) of the Interstate Highway System supposedly over a 10-year period, it was the largest public works project in American history through that time. The addition of the term "Defense" in the Act's title was for two reasons: First, some of the original cost was diverted from defense funds. Secondly, most US Air Force bases have a direct link to the system. The purpose was to provide access in order to defend them during an attack. All of these links were in the original plans, although some, such as Wright Patterson were not connected up in the 1950s, but only somewhat later. The money for the Interstate Highway and Defense Highways was handled in a Highway Trust Fund that paid for 90 percent of highway construction costs with the states required to pay the remaining 10 percent. It was expected that the money would be generated through new taxes on fuel, automobiles, trucks, and tires. As a matter of practice, the federal portion of the cost of the Interstate Highway System has been paid for by taxes on gasoline and diesel fuel. == Historical background of the Interstate Highway System == Eisenhower's support of the Federal-Aid Highway Act of 1956 can be directly attributed to his experiences in 1919 as a participant in the U.S. Army's first Transcontinental Motor Convoy across the United States on the historic Lincoln Highway, which was the first road across America. The highly publicized 1919 convoy was intended, in part, to dramatize the need for better main highways and continued federal aid. The convoy left the Ellipse south of the White House in Washington, D.C., on July 7, 1919, and headed for Gettysburg, Pennsylvania. From there, it followed the Lincoln Highway to San Francisco. Bridges cracked and were rebuilt, vehicles became stuck in mud, and equipment broke, but the convoy was greeted warmly by communities across the country. The convoy reached San Francisco on September 6, 1919. The convoy was memorable enough for a young Army officer, 28-year-old Lieutenant Colonel Dwight David Eisenhower, to include a chapter about the trip, titled "Through Darkest America With Truck and Tank," in his book ''At Ease: Stories I Tell to Friends'' (Doubleday and Company, Inc., 1967). "The trip had been difficult, tiring, and fun," he said. That experience on the Lincoln Highway, plus his observations of the German autobahn network during World War II, convinced him to support construction of the Interstate System when he became President. "The old convoy had started me thinking about good, two-lane highways, but Germany had made me see the wisdom of broader ribbons across the land." His "Grand Plan" for highways, announced in 1954, led to the 1956 legislative breakthrough that created the Highway Trust Fund to accelerate construction of the Interstate System. Eisenhower advocated for the highways for the purpose of national defense. In the event of a ground invasion by a foreign power, the U.S. Army would need good highways to be able to transport troops across the country efficiently. Following completion of the highways the cross-country journey that took the convoy two months in 1919 was cut down to five days. 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「Federal Aid Highway Act of 1956」の詳細全文を読む スポンサード リンク
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