South Korea has seven highway systems.[1]
- National expressways (Korean: 고속국도; Hanja: 高速國道; RR: Gosokgukdo)
- General national highways (Korean: 일반국도; Hanja: 一般國道; RR: Ilbangukdo)
- Special Metropolitan City roads and Metropolitan City roads (Korean: 특별시도·광역시도; Hanja: 特別市道·廣域市道; RR: Teukbyeolsido·Gwangyeoksido)
- Local highways (Korean: 지방도; Hanja: 地方道; RR: Jibangdo)
- Si roads (Korean: 시도; Hanja: 市道; RR: Sido)
- Gun roads (Korean: 군도; Hanja: 郡道; RR: Gundo)
- Gu roads (Korean: 구도; Hanja: 區道; RR: Gudo)
National Expressways
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National Expressways (Korean: 고속국도; Hanja: 高速道路; RR: Gosokgukdo) or Expressways (Korean: 고속도로; Hanja: 高速道路; RR: Gosokdoro)
General National highways
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General National highways (Korean: 일반국도; Hanja: 一般國道; RR: Ilbangukdo) or National highways (Korean: 국도; Hanja: 國道; RR: gukdo)
Special Metropolitan City roads and Metropolitan City roads
Special Metropolitan City roads and Metropolitan City roads (Korean: 특별시도·광역시도; Hanja: 特別市道·廣域市道; RR: Teukbyeolsido·Gwangyeoksido)
Special Metropolitan City roads
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Special Metropolitan City roads (Korean: 특별시도; Hanja: 特別市道; RR: Teukbyeolsido) are the highway in the special city (Seoul).
Metropolitan City roads
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Metropolitan City roads (Korean: 광역시도; Hanja: 廣域市道; RR: Gwangyeoksido) are the highway in the metropolitan city.
- Metropolitan City roads of Busan
- Metropolitan City roads of Daegu
- Metropolitan City roads of Incheon
- Metropolitan City roads of Gwangju
- Metropolitan City roads of Daejeon
- Metropolitan City roads of Ulsan
Local highways
Local highways (Korean: 지방도; Hanja: 地方道; RR: Jibangdo)
State-funded local highways
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State-funded local highways (Korean: 국가지원지방도; Hanja: 國家支援地方道; RR: Gukgajiwonjibangdo, shortly Korean: 국지도; Hanja: 國支道; RR: Gukjido)
General local highways
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General local highways (Korean: 일반지방도; Hanja: 一般地方道; RR: Ilbanjibangdo
Si roads
Si roads (Korean: 시도; Hanja: 市道; RR: Sido) are the highways in the cities (Si).
Gun roads
Gun roads (Korean: 군도; Hanja: 郡道; RR: Gundo) are the highways in the counties (Gun).
Gu roads
Gu roads (Korean: 구도; Hanja: 區道; RR: Gudo) are the highways in the districts (Gu).