TY JOUR TI Complex Spatial Geometry of Curved Sections on High-Speed Railways KW railway plan KW horizontal alignment KW high-speed railway KW passage curves KW verticals curves KW vertical and passage curve superimposition JO Bulletin of scientific research results AU Shkurnikov, S.V. AU Bulakaeva, O.S. AU Anisimov, V.A. PY 2022 IS 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"