TY JOUR TI History, condition and future development of automatic control systems of subway trains KW Petersburg Metro KW train timetable KW inter-train intervals KW train inactivity KW regaining KW automatic control algorithms KW automatic control signal station KW on-board automatic control equipment KW station automatic control equipment JO Transport automation research AU Nikul`chikov, P.. PY 2016 IS 2 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"