Seoul Subway Line 6

Seoul Subway Line 6 is a line of the Seoul Metropolitan Subway. The route connects Eunpyeong-gu and Jungnang-gu in a U-shaped manner, running through Yongsan-gu and Seongbuk-gu. It does not cross the Han River. It is mainly used to connect to the northern outskirts of Seoul and to relieve the traffic on other lines.

Line 6 has a unique arrow-shaped station sign design not shared with its fellow lines. The main part of the sign has the shape of a chevron pointing in the direction trains run, with the number printed in the top half, the Hangul name of the station in the middle, and the bottom half containing the English and Hanja names. An arm pointing out of the "front" (the pointed end) of the chevron indicates the next station, while an arm pointing out of the "back" (the indent) of the chevron indicates the previous station. The design is similar to Line 5, 7, and 8's station signs, but with a chevron instead of a triangle.

The line primarily operates in the section between Eungam and Sinnae, though some trains end one station before at Bonghwasan. When a train arrives at Eungam, it runs through what is commonly known as the "Eungam Loop," a one-way counterclockwise loop consisting of several stations. After going through the stations of the Eungam Loop, the train reaches Eungam again, from which it continues to Bonghwasan or Sinnae.