TY JOUR TI Passenger Service Based on the Principle of “Clean Feet”. A Series of Articles. Part 1 KW Passenger KW transport potential KW passenger flow movement KW the principle of “clean feet” KW infrastructure KW comfort JO Proceedings of Petersburg Transport University AU Shmanev, T.M. PY 2023 IS 20 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"