[crote]

Exactly, "in USA". That's where the "only popular in a single region of the world" part comes in.

Trucks, especially the variety seen in the US, are practically unheard of anywhere else in the world. When a specific style of vehicle is that popular in a single country it probably has more to do with legislation than driver preference. There is almost certainly a decent portion of people driving trucks who would prefer an alternative form factor - if only it were available. It'd make sense to distinguish "truck drivers" from "people driving trucks".