Highway system in South Korea

South Korea has seven highway systems. 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 == 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 == 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 === Special Metropolitan City roads (Korean: 특별시도; Hanja: 特別市道; RR: Teukbyeolsido) are the highway in the special city (Seoul).

Source: Wikipedia — Highway system in South Korea (CC BY-SA 4.0)