CSX 89' Tri-Level Auto Carrier #700922 (yellow rack, yellow Trailer-Train flat, early CSX logo). Over half of all new autos make their first long trip by train, riding in enclosed tri-level auto rack cars. Since autos are smaller and shorter than trucks or vans, the third deck increases carrying capacity; usually 15 mid-size or 18 compact cars make up a full load. As some of the longest and tallest equipment in operation, tunnels, bridges or other obstructions can present routing problems that require detours. To avoid this, a modified tri-level design was introduced in the mid 1970s. The 89' flat car that carries the rack is a special low-level car, easily identified by the side-sill cut outs that provide left and right side clearance for the trucks. In place of the usual 33 wheels, these cars ride on smaller 28 wheels to further reduce overall height. In service with most major roads, they can be found in the staging areas of every auto assembly plant, as well as reloading with import cars for their return trip.

Its key features are:
1970s to modern era
Factory-installed grab irons
Separately molded side ladders
Ultra-smooth rolling metal axles & 28 wheels
Proto MAX™ metal knuckle couplers