What does this supplementary plate indicate?

Question

KET Užduotys · Accepted Answer

Correct answer: Shows that the sign applies when the carriageway surface is wet.. Explanation: The supplementary plate No. 845 "Wet surface" shows that the road sign it accompanies (for example a speed-limit sign) applies only when the carriageway surface is wet.. KET reference: KET 1 priedas 845: Wet surface. Shows that the sign used with the plate applies when the carriageway surface is wet.