The corporation operates a total of 201 subway trains at 148 stations on lines 5-8. The operation intervals are from 2.5–6 minutes during rush hours and 5–10 minutes during non-rush hours. The combined daily ridership of subway lines 5-8 is 2,037,000.
In January 2013, the Transit Corporation published free guidebooks in three languages: English, Japanese and Chinese (simplifed and traditional), which features eight tours as well as recommendations for accommodations, restaurants and shopping centers. These were distributed from information centers in 44 subway stations, namely Itaewon Station on line 6 and Gwanghwamun Station on line 5. The eight tours are designed with different themes, e.g. Korean traditional culture. Which goes from Jongno 3-ga Station to Anguk Station and Gyeongbokgung Station on line No 3 that showcases antique shops and art galleries of Insa-dong.
The stations for Lines 5-7 are designed to fit in 8 cars on each platform, however subway stations operated on Line 8 is designed to fit 6 cars on each platform. All stations have 2 tracks. Each platform on every station operated by the Seoul Metropolitan Rapid Transit Corporation is equipped with a PSD, or Platform Screen Doors which help prevent suicide, and eliminate dust particles created by trains running in the tunnels. Each station's platform is also equipped with many large LCD television screens that are parallel to the Platform Screen Doors which displays the information on the trains locations, live news, and video instructions incase of an emergency. There are also 2 panels, covered with 2 large LCD television screens on each side of the panel (so a total of 4 screens on each flat panel, and there are 2 flat panels on each platform.) There is one display on each side of the panel that display the current time, arrival of the next two trains, at what door to transfer, (if at a transfer station) and the train's locations. The second screen displays advertisements, weather, and news. Regular panels without television screens attached to them serve as guides for exits, surrounding landmarks and exit locations and where the train will lead them to.