铁路输送能力是由列车密度和列车重量共同决定的。因此,需要两者间的合理匹配以求得较大的线路输送能力。对于双线铁路,采用自动闭塞、组织列车追踪运行,是提高线路行车密度和输送能力的有力措施,也是双线铁路的优势所在。同时,随着技术的进步,例如机车信号、自动停车、无线列调等装备的采用,给组织列车追踪运行创造了愈来愈好的条件。但是,较长大的下坡道,给组织列车追踪带来一定困难。甚至不得不继续采用大区间运行方 Railway transport capacity is determined by the combination of train density and train weight. Therefore, the need for a reasonable match between the two in order to obtain greater transmission capacity of the line. For double-track railway, the use of automatic block, track the operation of train organization is to improve the line traffic density and transport capacity of the powerful measures, but also the advantages of two-lane railway. At the same time, as technology advances, such as locomotive signals, automatic parking, wireless alignment and other equipment used to train the organization to create more and better conditions. However, the larger downslope, to organize the train to bring some difficulties. Even have to continue to use large area operator