Road signs in South Korea are regulated by the Korean Road Traffic Authority (Korean : 도로교통안전공단).
Signs indicating dangers are triangular with a red border, yellow background and black pictograms. White on blue for mandatory instructions, black on white with a red border for prohibitions, and supplementary information signs are rectangular and black text on a white background. Like other countries, the signs use pictograms to display their meaning. Any text included in signs will normally be in Korean and English. Signs are normally placed in the from 1 meter to 2.1 meters altitude.
South Korean signs depict classical silhouetted persons.
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Warning signs are triangular with yellow backgrounds, red borders and black pictograms.
Warning signs are round with white backgrounds, red borders and black pictograms.
Mandatory instruction signs are round with blue backgrounds and white pictograms.
Supplementary signs are rectangular with white backgrounds and black texts. Most of signs are only written in Korean.
Direction / Distance signs are rectangular with dark green backgrounds and white texts. In the urban area, direction signs are with dark blue backgrounds. The signs are normally written in Korean and English. In March 2010, Korea Expressway Corporation introduced new type of direction sign for expressway[1]. Currently, Korea Expressway Corporation changes old direction signs to new ones on their expressways. This new type of direction sign is exit guide based sign and has changed font from Sandol Doropyojipanche(Sandol Traffic Sign Font - You can see this Distance Sign and Direction Sign on below) to Hangilche(Hangil Font).