求翻译：道路上应有的最小视距应该是足以使那些等于或接近于速度行驶的车辆能在到达行驶路线上的障碍物之前停下来。是什么意思？

Should have minimum sight distance on the road should be enough to make those equal to or close to the speed of vehicles travelling in stopped before they reach the obstacle on the route.