Special Metropolitan City roads of Seoul
There are some Special Metropolitan City roads in Seoul (Hangul: 서울특별시도; Hanja: 서울特別市道; RR: Seoulteukbyeolsido). Basically in South Korea, urban municipalities maintain and designate highway routes. In Seoul, some of these routes are designated as motorways not allowed to walk. The numbering system of Seoul is complicated than the others: official number and guide number. Basically, official numbering system is used in the legal system only, while guide numbering system is used not only for the signage system, but also widely in public.
Classification
There are three types of Special Metropolitan City roads of Seoul: urban expressways (Hangul: 도시고속도로), trunk routes (Hangul: 주간선도로), and auxiliary routes (Hangul: 보조간선도로).
Urban expressways
There are 8 routes; some of them are overlapping with each others.
| Official number | Guided number | Name | Korean name | Length (km) | Note |
|---|---|---|---|---|---|
| C3 | 30  |
Seoul Inner Loop (Naebusunhwan-ro) | 내부순환로 (내부순환도시고속도로) | 40.1 | overlap with National Route 46 and National Route 77 |
| 01 | 1  |
Western Highway (Seobuganseon-doro) | 서부간선도로 (서부간선) | 16.8 | overlap with National Route 1 and National Route 48 |
| 02 | 61 |
Eastern Highway (Dongbuganseon-doro) | 동부간선도로 (동부간선) | 32.5 | overlap with National Route 46 and ce 30 |
| 03 | - | Northern Highway (Bukbuganseon-doro) | 북부간선도로 (북부간선) | 7.8 | |
| 04 | 70 |
Gangbyeon Northern Highway (Gangbyeonbuk-ro) | 강변북로 | 29.0 | overlap with National Route 46, National Route 77, ce 30 and ce 61 |
| 05 | 88 |
Olympic Highway (Olympic-daero) | 올림픽대로 | 42.5 | |
| 06 | 1  |
Gyeongbu Highway (Gyeongbuganseon-doro) | 경부간선도로 (경부간선) | 6.8 | |
| 07 | 94 |
Gangnam Loop (Gangnamsunhwan-ro) | 강남순환로 | 13.8 |
1 |
| 1 | |