Your calculation doesn’t allow any time for those truckers to eat,shower,shave,change clothes,wash clothes,use the toilet,etc.
I’ve met a few truckers like that and ,so far, they were mostly Mexican drivers.Both truck and drivers literally stank from no hygiene.Where do you suppose the waste goes when the truck has a outhouse hole in the floor?
[Where do you suppose the waste goes when the truck has a outhouse hole in the floor?]
Getting off the subject, I’m old enough to remember when the toilets of passenger trains flushed directly onto the tracks. Conductors would lock the bathroom doors when the train was stopped at a station.