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针对郊区化现象负面效应的不断显现,美国联邦政府开始出台法律法规予以干预,鼓励和促进新城建设促使其成为改善郊区化蔓延的主要手段。这也是美国“边缘新城”建设的由来。1968年,美国国会通过《新城开发法》,批准建立第一批63个郊区型新型城市,这些新城平均人口规模在2万人至10万人左右,面积40-100平方公里之间。新城按照区位布局分为:独立型、半独立型和附属型三种。1970年《住房和城市发展法》加大了私人对新城投资贷款额度的保证(从1968年的2.5亿美元提高至5亿美元),并鼓励各州成立新城开发公司,加速了新城建设。
In response to the constant appearance of the negative effects of the phenomenon of suburbanization, the federal government in the United States began to introduce laws and regulations to intervene to encourage and promote the construction of the new city and make it the main means to improve the spread of suburbs. This is also the origin of the U.S. “edge of the Metro” building. In 1968, the U.S. Congress approved the “Metro Development Law” and approved the establishment of the first batch of 63 new suburban-type cities. The average size of these new towns ranges from 20,000 to 100,000 and covers an area of 40 to 100 square kilometers. Metro layout in accordance with the location is divided into: independent, semi-independent and ancillary three. The Housing and Urban Development Act of 1970 increased the amount of private guarantees for investment loans to Metro (from $ 250 million in 1968 to $ 500 million) and encouraged states to set up Metro Development Corporation and accelerate the construction of the Metro.