I was on Benzos for a short period of time. I would take it when I wasn't working and it would knock me out.
The next day at work driving, I would get super drowsy by the end of night/morning while still driving as if I didn't get enough sleep even though I did.
Stopped taking them and I was fine.
Benzos and trucking,especially if you drive at night are a bad combo. That's taking them when not on duty.
You should be disqualified as a driver if you "need" to take them on duty.