中文摘要：

冰雪路面条件下交通特性复杂，对无信号交叉口通行能力产生严重影响。对比分析冰雪路面及正常（非冰雪）路面条件下的无信号交叉口车辆的临界间隙、车头时距，利用可接受间隙理论分析了无信号交叉口在冰雪路面和正常条件下通行能力，确定了冰雪对其通行能力的影响，提出冰雪路面条件下车头时距修正系数及无信号交叉口通行能力冰雪路面影响系数，为研究冰雪路面条件下交通流特性作补充，为指导寒冷地区交通工程设施设置提供依据。

英文摘要：

Traffic characteristic on the conditions of ice-and-snow road performance is quite complex and that seriously influenced the capacity of non-signaled intersection. This paper comparatively analyzed the critical gap and headway on the condition of ice-and- snow or normal, and then analyzed the capacity of non-signaled intersection by the acceptability gap theory, and put forward the headway modify coefficient fsh and the non-signaled intersection capacity modify coefficient fscfOr ice and snow. The results are the complementarities of traffic flow characteristic on ice-and-snow condition, and they are useful for directing setting traffic engineering facilities in the cold zone