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美国的交通运输业十分发达,铁路总长约30多万公里,铁路网平均密度为每100平方公里有4.5公里;公路约有600多万公里,已形成纵横交错、四通八达的公路系统,特别是高速公路发展迅速,长度7万多公里,约占世界高速公路总里程的2/3,各大城市间都有高速公路相通.与此相适应,美国的物流配送技术也是比较先进的.物流配送大都采用集装单元化作业,即把商品集装于社会统一系列尺寸的盛器(如托盘、集装箱、货柜)中,形成
The transportation industry in the United States is well-developed. The total length of the railway is about 300,000 kilometers. The average railway network density is 4.5 kilometers per 100 square kilometers. There are about 6 million kilometers of highways. There are criss-cross and extensive road systems, especially high-speed The rapid development of the highway, the length of more than 70,000 kilometers, accounting for about two-thirds of the total mileage of the world’s highways, major cities are freeway interchange .According to this, the United States logistics and distribution technology is more advanced .Most logistics and distribution The use of container unitization operations, that is, the product is assembled in a social series of uniform size containers (such as trays, containers, containers), the formation of