附加车道【auxiliary lane】指的是道路上局部路段增辟专供某种需要使用的车道。包括变速车道、爬坡车道等。
还包括道路设计应用，例如中央分隔带的设置、附加车道和交通信号的合理间距。
It also involves roadway design applications, such as median treatments and auxiliary lanes, and the appropriate spacing of traffic signals.
以出口速度及流量为评价指标，研究了不同交通流量组合情况下附加车道长度的变化规律。
The outcome show that the length of extra lane is concerned with the traffic flow of the exit and the secondary road, and the reasonable length is recommended as 100~120 m.
通过仿真试验，对其结果分析得出城市快速路菱形立交出口附加车道长度及其渠化长度建议值。
Through using simulation trial, the author has analyzed the trial result and worked out the recommendation value of auxiliary lane and channelization length of urban expressway exit.
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