Seoul City Route 21 (Trunk)

Seoul Metropolitan City Route 21 is a road located in Seoul, South Korea. With a total length of 17.7 km, this road starts from the Siheung-dong in Geumcheon District, Seoul to Jungnim-dong in Jung District.

Stopovers

 * Seoul
 * Geumcheon District - Gwanak District - Guro District - Dongjak District - Yeongdeungpo District - Yongsan District - Jung District

List of Facilities
IS: Intersection, IC: Interchange
 * ( ■ ): National Route 1 overlap