Up to 2003 the year's end, the American road total course achieved6.398 million kilometers, occupy the first in the world; The highwaycourse amounts to 94,000 kilometers, also occupies the first in theworld. In the US highway traffic history the grandest project is theEisenhower state border and the national defense highway system, thisproject in 1956 after when was appointed American President Eisenhowerto sign "in 1956 Federation To subsidize Road Bill" to implement. Thisproject basically completes to 20th century 70's intermediate stages,the span 78,000 kilometers, by the highway constitution, havecompletely connected the American population in 50,000 person of aboveall cities, has formed by the state border highway ststem the roadnetwork which extends in all directions for the backbone.
US'S automobile total quantity also occupies the world first place. In2003 achieved 237 million, approximately compose the world totalquantity 31.1%, passenger vehicle achieved 136 million, approximatelycompose the world total quantity 26.5%, the average every hundredpeople have passenger vehicle 46.7, each family has passenger vehicle1.23. The American adult has 驾照 the ratio to approach 100%.
In the synthesis transportation system, US'S road freighttransportation and the passenger transportation way occupy thedominant position. Take 2001 as the example, the interurbantransported goods volume which the highway transportation waycompletes is 7.666 billion tons, approximately composes each transportmode 65.9%; The volume of freight turnover is 169 billion tonkilometers, approximately composes each transport mode 28%. The roadvolume of passenger turnover is 751 billion passenger-kilometer,approximately composes each transport mode 89.8%, the road volume ofpassenger turnover major part is completes by the passenger vehicle.
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