Highway system in South Korea

National Expressways

National Expressways (Hangul: 고속국도; Hanja: 高速道路; RR: Gosokgukdo) or Expressways (Hangul: 고속도로; Hanja: 高速道路; RR: Gosokdoro)

General National highways

General National highways (Hangul: 일반국도; Hanja: 一般國道; RR: Ilbangukdo) or National highways (Hangul: 국도; Hanja: 國道; RR: gukdo)

Special Metropolitan City roads and Metropolitan City roads

Special Metropolitan City roads and Metropolitan City roads (Hangul: 특별시도·광역시도; Hanja: 特別市道·廣域市道; RR: Teukbyeolsido·Gwangyeoksido)

Special Metropolitan City roads

Special Metropolitan City roads (Hangul: 특별시도; Hanja: 特別市道; RR: Teukbyeolsido) are the highway in the special city (Seoul).

Metropolitan City roads

Metropolitan City roads (Hangul: 광역시도; Hanja: 廣域市道; RR: Gwangyeoksido) are the highway in the metropolitan city.

Local highways

Local highways (Hangul: 지방도; Hanja: 地方道; RR: Jibangdo)

State-funded local highways

State-funded local highways (Hangul: 국가지원지방도; Hanja: 國家支援地方道; RR: Gukgajiwonjibangdo, shortly Hangul: 국지도; Hanja: 國支道; RR: Gukjido)

General local highways

General local highways (Hangul: 일반지방도; Hanja: 一般地方道; RR: Ilbanjibangdo

Si roads

Si roads (Hangul: 시도; Hanja: 市道; RR: Sido) are the highways in the cities (Si).

Gun roads

Gun roads (Hangul: 군도; Hanja: 郡道; RR: Gundo) are the highways in the counties (Gun).

Gu roads

Gu roads (Hangul: 구도; Hanja: 區道; RR: Gudo) are the highways in the districts (Gu).