During the 1970s, it also began production of Taebaeksan and Tujaeng light trucks. Since 1974, the Chongjin Bus Works has produced the Jipsam 74, Chongnyonjunwi and Chongjin trolleybus, the Jipsam 86 articulated trolleybus and the Pyongyang 9.25 and Jipsam 86 and 88 buses. Since 1961, Pyongyang Trolleybus Works has produced Chollima 1, 2, 9.11, 9.25, 70, 72, 74 and 84, Chongnyon, Chongnyonjunwi, Ikarus 260T, Ikarus IK187, and Chollima 032 trolleybuses; the Chollima 962, 90/903, Ikarus 280T and Sonyon articulated trolleybuses, Pyongyang 9.25 buses, Kwangboksonyon articulated buses and Chollima mini-buses. Kim Jong-tae Locomotive Works in Pyongyang has produced modified Czech Tatra KT4 trams since the 1990s.