This road sign is installed before:

1. 1By artificially created bumps in places where it is necessary to forcibly limit the travel speed of vehicles.
2. 2Sections of roads with potholes or subsidence of the road surface on the carriageway.
3. 3Sections of roads with bumps, ridges, or uneven joining of bridge structures.
4. 4Sections of roads on which gravel, crushed stone, etc. may be thrown out from under the wheels of vehicles.