TY JOUR TI DESIGN AND CALCULATION OF ROAD SURFACE BY METHOD OF STRUCTURAL NUMBERS KW method of structural numbers KW construction of road clothing KW methods for calculating structures of road clothing KW structural layers JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Gorshkova, N.G. AU Aleksandrov, D.A. PY 2020 IS 5 PB Belgorod State Technological University named after V.G. Shukhov