Does the visible sign warn of a bulge on the roadway designed to slow down vehicle traffic?

The visible warning sign A-11a "road hump" informs of a transverse hump on the carriageway, which is used to limit the speed of vehicles. The supplementary plate T-1 placed under the sign specifies that this obstacle is located at a distance of 15 metres. Therefore, this sign warns exactly about the situation described in the question.