Its total population (based on TL5 data) that lives within a ten-minute walking distance from a bus stop is 81% (compared to 75% in Daejeon, second-ranked) and 19.8% within a ten-minute walking distance from a train station on average (compared with 12.2% in Busan, second-ranked). Most areas in Seoul have a balanced level of accessibility to bus stops and train stations, which is quite unique compared with other TL3 regions in Korea. A comprehensive public transport network, composed of 9 subway lines, 355 intra-city bus routes and 238 village bus routes, serves Seoul’s 25 autonomous districts (gu) (Seoul, 2016a).