Most trains head further northwest to serve Goyang via the Ilsan Line.

[1] In 2021, the Seoul Metro operated section had an annual ridership of 295,930,000 or 810,767 passengers per day.

[2] In December 2010 the line is recorded as having the second highest Wi-Fi data consumption in the Seoul Metropolitan area.

It averaged 1.8 times more than the other 14 subway lines fitted with Wi-Fi service zones.

In January 2013, the Seoul Metropolitan Rapid Transit Corporation, published free guidebooks in three languages: English, Japanese and Chinese (simplified and traditional), which features eight tours as well as recommendations for accommodations, restaurants and shopping centers.