Railway transportation being an important mode of transportation in many countries especially in Asia and Europe plays a key role in passenger and freight transportation markets.

世界上许多国家，尤其是亚洲和欧洲国家，铁路作为一种重要的运输方式，在其客、货运市场上担当着重要的角色。

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These networks are suitable for studying all kinds of transportation modes and multi-mode passenger transfer (problem.)

这些换乘网络适用于研究多种交通方式以及混合交通的旅客换乘问题。

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