FREIGHT CAR TRUCK COMPLEX MODERNIZATION Truck complex modernization elements Experimental dependencies of wheel flange wear with different initial profile from car mileage Constant contact slide Ductile iron wedge Wear-resistant profile wheels Polymeric lining The Ukrainian working freight car fleet update The introduction of 1520 mm track width on railways Other types (transporters, dump cars, hopper feeders etc.) 2,8% Country Number of complex modernized cars Ukraine 46000 Belarus 1000 Kazakhstan 500 Russia 200 FOR 89% OF CARS RECOMMENDATIONS ON MODERNIZATION WERE DEVELOPED, TESTS WERE CONDUCTED Boxcars 9,0% Platforms 5,3% 33% MODERNIZED GONDOLA CARS Hoppers 17,1% Gondola cars 47,6% Tanks 18,2%