Special Metropolitan City roads of Seoul

The Seoul Metropolitan City roads, known as 서울특별시도 in Korean (Seoulteukbyeolsido), is a form network of highways that cover the metropolitan region of Seoul. These highways are maintained and designated by urban municipalities and are distinguished from other road systems by their official number and guide number. The official numbering system is specifically used in the legal context, while the guide numbering system is utilized for signage and is widely acknowledged by the public.

Classification
Seoul Metropolitan City roads consist of three categories: urban expressways (도시고속도로 in Korean), trunk routes (주간선도로 in Korean), and auxiliary routes (보조간선도로 in Korean).

Urban expressways
There are a total of 10 routes in the Seoul Metropolitan City road network, and some of these routes may overlap with each other.