Semi-trailer truck

Semi-trailer truck (simply called truck in game) is a drivable vehicle available in the Midwest.

Background
A road tractor is a high-powered truck designed to pull trailers; the mobile science lab can be attached to it. It was originally designed to be a vehicle with an infinite storage capacity that could also transport other vehicles.

Appearances
The road tractor was going to appear in Van Buren, the canceled Fallout 3 by Black Isle Studios.