Limited sightlines are:

• 1Visibility of the road in the direction of travel of less than 300 m under conditions of reduced visibility that is limited by the geometric parameters of the road.
• 2Visibility of the road in the direction of travel that is limited by the geometric parameters of the road, by roadside engineering structures, plantings, and other objects, as well as by vehicles.
• 3Visibility of the road limited by conditions of fog, rain, snowfall, etc.