停车视距（stopping sight distance）指的是同一车道上，车辆行驶时遇到前方障碍物而必须采取制动停车时所需要最短行车距离。停车视距可分解为反应距离、制动距离和安全距离等三部分来研究。简单的说，停车视距就是驾驶员在发现障碍物前停住所需要的最短距离。
夜间的交通事故率及其危害性都远高于白天，一个重要原因是夜间停车视距不足。
The traffic accident rate and its harm in nighttime is more than those in daytime, one important reason is the shortage of night stopping sight distance.
在高速公路中央分隔带外侧超车道的停车视距不能满足规范要求时，提出了解决问题的方案和措施，供高速公路设计时参考。
When stopping sight distance can't meet the specification's needs in passing lane outside the median divider in expressway, some measures are put forward for reference of expressway design.
为了满足具有中央分隔带公路弯道外侧超车车道停车视距的需要，保障行车安全，根据汽车在超车车道上的行驶特性，分析了具有中央分隔带公路弯道外侧超车车道上司机视点的位置和横净距。
On the basis of the properties of motorcar running on passing lane, the sight point position and lateral clear distance of curve in passing lane outside the median divider in expressway are analyzed.
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