目前我国东部地区南北铁路客货运输主要靠京沪、京广、焦柳三大干线。1989年这三条干线的南下货流（陇海线以南）已达到15000万吨，客车69对，能力已接近饱和。在南下客货流中，过长江运量又占很大比重。1989年南京、武汉、枝城三桥和芜湖轮渡的下行过江运量已达到11185万 At present, the north-south railway passenger and freight transport in the eastern part of our country mainly depends on the three major routes of the Beijing-Shanghai, Beijing-Guangzhou and Jiao Liu. In 1989, the three southern routes of goods flow (south of Longhai Line) has reached 150 million tons, 69 pairs of buses, capacity is close to saturation. In the southern passenger and cargo flow, the Yangtze River traffic accounted for a large proportion. In 1989, Nanjing, Wuhan, Zhijiang Bridge and Wuhu ferry down the river traffic has reached 11185 million