提出了道路交叉口各级服务通行能力的确定方法。
And service levels and service capacity of road junction are presented.
依据该模型提出了拓宽左转车道的基本服务通行能力的建议值，并给出了各修正系数以及实用服务通行能力的确定方法。
The suggestion value of basic service capacity of widened left-turn lane is given and how to determine modificatory coefficients and practical service capacity is also presented.
服务质量的提高是通行费不断上涨的一个理由。
Improved service is one justification for the increased tolls.
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