 In the 1990s, the trains received their current numbers.The 14 trains that utilized eight Japanese-made cars were numbered as trains 1-01~1-14, while the seven that lost their original motor cars were renumbered to 1-29~1-35.The train that became train 1-02 was involved in an accident at the Hankuk University of Foreign Studies station on October 2, 1984, that led to two damaged cars (a driving car and a motor car) being scrapped and the rest of the train being placed out of service.