Autorack

Auto-rack train car carries automobiles
Autorack terminal in New Richmond, Wisconsin[1]
A modern German autorack similar to the original design with a full load of automobiles

An autorack, also known as an auto carrier (also car transporter outside the US), is a specialized piece of railroad rolling stock used to transport automobiles and light trucks. Autoracks are used to transport new vehicles from factories to automotive distributors, and to transport passengers' vehicles in car shuttles and motorail services, such as Amtrak's Auto Train route.