EXISTING COMMUTER RAIL 现有城内换乘铁路
Therefore, it is necessary to research a new technique to improve the existing rail traffic data platform.
因此有必要引入新的技术手段对现有的轨道交通基础数据平台进行改进。
In the United States, pedestrian pathways or bicycle trails are sometimes located along with existing rail corridors.
在美国,人行道与自行车道有时会沿着现有的铁路轨道。
The demand up to the year 2000 can be satisfied by improving quality and raising the weight of rails and by expanding existing rail-and-beam mills.
提高重轨质量和单重以增加列车载重和车速,扩建现有轨梁轧机,可以满足2000年前需要。
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