Aiming at the potential problems of the referential value of speed change lane in current norms of China, the comparative research on norms at home and overseas is carried out.

针对我国现行规范中变速车道参考值所存在的问题，对比国外规范进行研究。

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It's a lesson, when you are changing lane in high speed way, you must keep looking and watching until you make sure really no problem, then you make change, or accident happens easily.

这是一个教训，当你在高速路上要换道的时候，你一定要保持观看，确定没有问题后才换道，否则事故很容易发生。

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