TY CONF TI CURRENT PROBLEMS OF OPERATING RAILWAY CAR KW car fleet KW car fleet management KW car deficit KW car surplus KW car turnover JO INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "MANAGEMENT OF OPERATIONAL WORK IN TRANSPORT" (UERT-2022) AU Poliektov, D.A. AU Vasil'evIL'EV G, G.L. AU Nikiforova, G.I. PY 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"