With the more than 20 , 000 miles of rails added to the transportation system between 1850 and 1860 , total trackage surpassed 30 , 000 at the end of the decade , and the volume of freight traffic equaled that of canals 1860年间，铁路运输系统又增加了2万英里，到1860年底，铁路总里程已超过3万英里，铁路货运量与运河持平。
