Seoul Subway Line 3

Seoul Metropolitan Subway Line 3 of the Seoul Metropolitan Subway is a rapid transit train. It connects Eunpyeong District to Gangnam and southeastern Seoul. Most trains on this line go further northwest to Goyang along the Ilsan Line. In 2019, 330 million or about 900,000 passengers per day rode the train along the Seoul Metro section.
In December 2010 the line had the second highest WiFi data use in the Seoul Metropolitan area. It averaged 1.8 times more data use than the other 14 subway lines that have WiFi service.
History.
Construction began in 1980. The first section of Line 3 opened (Gupabal–Yangjae; Jichuk opened in 1990) after work was finished in two stages during 1985. In October 1993, a second extension to the south was opened (Yangjae–Suseo).
In March 1996, the Korail Ilsan Line opened. This lets Line 3 trains go all the way to the city of Goyang. There are 2 depots near Jichuk station and Suseo station for both Korail and Seoul Metro.
A 3 km extension opened on February 18, 2010. It goes from Suseo to Garak Market (Line 8) and Ogeum (Line 5).
On December 27, 2014, Wonheung station opened between Wondang and Samsong stations.