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美国领土面积937万平方公里,现有人口2.55亿,面积、人口均居世界第四位,全国分为50个州和首都华盛顿所在地哥伦比亚特区,共3042个县,此外,还有3.3万平方公里的海外领地和托管地。美国是世界上交通运输业最为发达、最为现代化的国家,其交通运输网络密布、四通八达,第二次世界大战后,由于各种运输方式趋于发展成熟,美国已形成了一个综合运输网络系统。交通运输在国民经济中起着十分重要的作用。目前,美国交通运输包括铁路、公路、水运、航空和管道
The U.S. territory covers an area of 9.37 million square kilometers and currently has a population of 255 million. It has the fourth largest population in the world and is divided into 3042 counties in 50 states and the capital of Washington, DC. In addition, there are 33,000 square kilometers Overseas Territories and Hosting. The United States is the most developed and most modernized country in the world in terms of transportation. The United States has formed an integrated transport network system since the various transport modes became mature after the Second World War. Transportation plays a very important role in the national economy. Currently, U.S. transportation includes railways, highways, water transport, aviation and pipelines