autorack

English edit

autoracks ready for loading

From auto +‎ rack.

autorack (plural autoracks)

(US) A railroad car designed for the transport of cars.
Synonym: automobile car
- 2011, Josh Mack, The Hobo Handbook: A Field Guide to Living by Your Own Rules:
  Autoracks, or car carriers, were developed to carry cars. Initially the railroads just transported automobiles single file on flat bed cars, but soon realized it was a pretty inefficient use of space and that they could double, and then even triple, the number of cars by adding levels above the first row. Hobos of the modern age who happened upon autoracks had struck gold.

railroad vehicle