It appears that the "brushes" on the front, bearing on the track, are to knock away rocks and other debris.
Otherwise the railcar might jump the track due to a rock, etc. or at the least experience a bumpy ride.
Many railcars & trucks had such things, I have seen railcars with small "whisk brooms" attached to ride the rail head.
Of course, if one can believe in the Easter bunny or Santa Claus,
then there is a belief that real trains operate on track pickups (not just third rails) and DCC.
I'm just sayin'....
____________________ It doesn't matter if you win or lose, its' how you rig the game.