This Code is prepared with the view to unifying the technical standards of railway alignment design， and making the design meet the requirements on safety， reliability， advanced. technology， economical efficiency and applicability.This Code is applicable to the alignment design of standard-gauge high-speed railway，intercity railway，Class I and Classllmixed traffic railway，as well as heavy-haul railway. The alignment design of heavy-haul railway which also serves passenger transport shall be conducted according to the same design standards as that of mixed traffic railway， The alignment design of Class III and ClasslV railway shall be conducted according to related design standards.
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