Seoul Metropolitan Rapid Transit Corporation (SMRTC) was established in 1994 to operate the Seoul subway lines 5, 6, 7, and 8.
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 5-6 minutes during non-rush hours. 2,037,000 passengers on average per day use subway lines 5-8.