Sindorim

Sindorim station is a station on Seoul Subway Line 1 and Line 2. It is also the southeastern terminus of Line 2's Sinjeong Branch to Kkachisan. The station is located at the northern edge of Sindorim-dong, Guro-gu, Seoul, on the border with Yeongdeungpo-gu.

Sindorim station is designed primarily to serve as a transfer station of the Subway Lines 1 and 2, having no direct exits from the Line 1 platform. It is known to be the most congested transfer station of Seoul Subway, especially during the rush hours. It is estimated that over 320,000 passengers per day use Sindorim Station to transfer between Lines 1 and 2. A plan to extend the Line 2 part of the station, including a new platform for the outer circle line, is now on design. Screen doors have been added to the subway platforms.

Source: Wikipedia