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中文摘要：
为了达到有效引导交通流的目的，首先从驾驶心理学的角度将驾驶员对交通标志的识别和对所驾车辆的操作过程分为7个点6个阶段进行研究，在对已有交通标志设置条件进行分析的基础上，得到了交通标志位置设置的依据，然后对驾驶员由城市快速路外侧2车道向外侧1车道的车道转变过程进行了微观分析，在此基础上利用概率论方法，得到了车辆由外侧2车道向外侧1车道汇合时操作行动距离L的理论模型，进而得到了城市快速路出口标志位置设置前置距离D的理论模型，最后通过实例计算得到了城市快速路不同设计车速下出口标志设置的前置距离．
英文摘要：
In order to guide traffic flow effectively, this paper firstly divided the process of identifying traffic signs and operating vehicle into seven points and six phases from the viewpoint of driving psychology. And by analyzing the existing setting conditions of traffic sign pointed, the basis of setting traffic sign is got. Then the process of changing lanes from the outer second one to the outer first one on urban expressway is analyzed in detail. On the basis of it and by means of probability analysis, the theoretical model of operating distance when vehicles merging from the second lane to the first one is obtained, and then the theoretical distance model of traffic sign to the beginning point of off-ramp is also acquired Lastly the distance of traffic sign to the beginning point of off-ramp belonging to different designing velocity was calculated out.
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