Railway transport is an important part in the system of comprehensive transportation in China, it's role can't be substituted.

铁路运输是我国综合运输体系的重要组成部分，具有无可替代的作用。

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The network planning of the urban rail transit is a sub-plan of the transport planning field, meanwhile, it is the important component of the comprehensive transport planning system.

城市轨道交通网络规划是城市交通规划领域的一个专项规划，同时也是综合交通规划体系的重要组成部分。

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The system of integration of transport must possess the characters of comprehensive, systematic, technical and economic in nature.

综合运输系统从本质上说要求具有综合性、系统性和技术经济性等几个特征。

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Earlier this year, the assembly backed a motion expressing concern at the "poor state" of the public transport system and seeking a comprehensive and integrated policy to be implemented.

BBC: Northern Ireland Railways train