Aiming at the potential problems of the referential value of speedchangelane 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.