N.M. Legkiy1, V.D. Sokolova2, V.I. Bogomolov3, V.E. Erkhov4, A.A. Pechnikov5

1,2 Russian Open Academy of Transport (Moscow, Russia)
3 Russian State Social University (Moscow, Russia)
1,4,5 MIREA – Russian University of Technology (Moscow, Russia)
1 legki@rambler.ru