许多分析研究资料指出:增加列车重量是提高铁路运输能力的有效途径。当前,列车重量难以进一步增加的首要原因,是受到站线长度的限制。在850米站线长度和货车延米重量小于5吨/米的条件下,列车重量不易超过4000吨。突破这一限制,需要延长站线和发展重型车辆。两者都不能期望在近期内取得很大进展。 Many analytical studies point out that increasing train weight is an effective way to improve railway transport capacity. At present, the primary reason that the weight of a train is hard to be further increased is that it is limited by the length of the station line. In 850 meters station line length and the weight of the truck Yanmi less than 5 tons / m conditions, the train weight is not easy to exceed 4,000 tons. Breaking this restriction requires the extension of station lines and the development of heavy vehicles. Neither can expect much progress in the near future.