Can anyone tell me the meaning of this South Korean street sign?
It looks like a speed limit to me, but the colors are inverted (white font on black instead of black font on white). I searched different websites that deal with driving abroad, but I can't find anything. Wikipedia does not have it either.
I was able to translate the text in the bottom one ("school zone from here, slow down"), but I also found signs with the exact same text that have a normal (black on white) speed limit printed on them.
I wonder whether this is just a variant of the regular speed limit or whether it holds any special meaning that I should be aware of.