TY CONF TI IMPROVING THE SAFETY OF TRAIN TRAFFIC BASED ON THE METHOD OF DETECTING OBJECTS OBSTACLES AT RAILWAY CROSSINGS KW railway crossing KW obstacle KW contour KW key points KW object classification KW train traffic control JO INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "MANAGEMENT OF OPERATIONAL WORK IN TRANSPORT" (UERT-2022) AU Fahmi, S.S. AU Korolev, O.A. AU Pyshkina, N.Y. PY 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"