Seoul Subway Line 2, also known as the Circle Line, is a circular line of the Seoul Metropolitan Subway. The line running clockwise is called the "inner circle line" and the counter-clockwise line is called the "outer circle line". This is Seoul's most heavily used line, and consists of the main loop, the Seongsu Branch and the Sinjeong Branch for a total line length of 60.2 km (37.4 mi). The Line 2 loop is the third longest subway loop in the world after Moscow Metro Bolshaya Koltsevaya line and Beijing Subway Line 10. In 2019, Line 2 had an annual ridership of 812 million passengers or 2.2 million passengers per day.
Seoul Subway Line 2
Commemorative ticket issued for the opening of the second phase of Seoul Subway Line 2 on December 23, 1982.
Second-generation Seoul Metro 2000 series VVVF-inverter train (third batch) crossing the Dangsan Railway Bridge on the Han River in October 2022.
A circle route is a public transport route following a path approximating a circle or at least a closed curve.
High Street Kensington station on the Inner Circle line in London, the world's first circle line.
Line 10 of the Beijing Subway, the world's second longest circular metro line
