With the expand of urban scope , great change have taken place in railroad hinge , many internuncial lines and lateral lines had been surrounded . former status and function had been losed , capacity of transportation is surplus 同时，随着城市规模的扩张，我国大城市铁路枢纽也逐渐发生了很大变化，铁路枢纽内的许多联络线、支线逐渐被城市包围，逐渐失去了原来的地位和作用，运能虚糜，设备、设施闲散。
2.
The international freight agent in china supplies service by internuncial station during the cargo and the vessel . they ca n ' t give high effective integrative service owing to absencing their own warehouse , load and unload equipment or conveyance 长期以来，我国的国际货运代理一直处于船、货之间，以中间人的身份为顾客提供服务，大部分代理不具有自己的仓库、装卸设备和运输工具等“硬件”设备，很难为顾客提供高效的一体化服务。
3.
In second part , the feasibility and necessity that a internuncial line of the railroad hinge ( lishu bay - cai yuan dam ) participate in new no . 1 light railway in chongqing is analyzed , at the point of technology and economy , at the same time , the pattern of operation and management is being probed . at last , the methods of joining and transferring among state railway . outskirts railway and routine public traffic is been analyzed 本文第二部分对重庆铁路枢纽内梨树湾至菜园坝一条重要联络线参与重庆轻轨交通新号线进行研究，首先介绍重庆市客运现状和交通路网现状，结合重庆市铁路枢纽的调整规划，通过对梨菜线参与城市轨道交通的几种运营模式和管理模式的比较，提出了一个比较适合重庆市特点的运营管理方案，并从技术、经济、政策方面分析了其可能性和可行性。
