Russian forces prefer to use drains and rail lines as a logistics and capability is a lot easier than trying to use trucks and aviation let alone it is phenomenally cheaper. Kind of why militaries around the world rely on trains as the most efficient way to transport equipment overland.

I bet the Ukranazi would like to run their army on trains again, but blowing up the Crimean Bridge cost them having to resort to other means of transport, well there's sightings of steam powered locomotives in lieu of the electric ones that remain parked, LOLOLOLOLOL!