This road sign is installed before:

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