中文摘要：

在分析多车道公路信号平交口间路段交通流运行特征的基础上,提出了基于交通流稳定距离的平交口安全间距分析方法。利用交通冲突率在路段上的分布趋势,验证了以CV（车速标准差变异系数）值作为间接安全评价指标的有效性;在仿真环境下,分析了交通量、信号周期、转向交通量比例、货车比例对CV值分布的影响;对典型环境下CV值的分布进行了曲线拟合,从而确定了各接入类别多车道公路的交通流稳定距离;结合平交口上游功能区的长度,给出了信号平交口最小安全间距的推荐值。结果表明：从交通流角度分析平交口间距是可行的,多车道公路信号平交口最小安全间距可表示为交通流稳定距离与平交口上游功能区长度之和。

英文摘要：

By analyzing the traffic flow characteristics of the link between two signalized intersections of multi-lane highway,analysis method of signalized intersection safety spacing was presented on the basis of traffic flow stability distance.According to the distribution tendency of traffic conflict rates,the effectiveness of CV（coefficient of variance of speed standard deviation） value which could be used as indirect safety evaluation index was verified.The influences of traffic flow,optimal signal cycle,rate of turning traffic and truck percentage on the CV value distribution were analyzed under the simulation environment.The CV value distribution of multi-lane highway under each access type was fitted.Considered the truck percentage,traffic flow stability distance for multi-lane highway under each access type was given.Combining the up-stream functional area length of intersection,the recommendable value of minimal safety spacing of signalized intersection was established.The results show that through the point of view of traffic flow,intersection spacing can be analyzed.The minimal safety spacing of signalized intersection can be illustrated by the sum of traffic flow stability distance and the up-stream functional area length of intersection.