Then, it investigates the most effective evaluation index of left-turning traffic forbiddance system, discusses of two cases a section of a road and an intersection, separately.
然后，提出了禁左交通效果评价的主要指标，分别考虑路段和交叉口两种情况。
Then, it investigates the most effective evaluation index of left-turning traffic forbiddance system, discusses of two cases a section of a road and an intersection, separately.
然后，提出了禁左交通效果评价的主要指标，分别考虑路段和交叉口两种情况。
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