Warns of bumps, potholes, holes and other irregularities in the road, or an area with an uneven road surface that requires caution or a significant reduction in speed .
Warns of artificial unevenness of the road, the purpose of which, in particular, is to reduce the speed of movement of vehicles .
Directly indicates an artificial unevenness on the road, the purpose of which is to reduce the speed of movement of vehicles .