How long should you wait before you driveNEW by: Hervy
Driving a commercial vehicle it's best to not drink if you know you will have to drive afterwards because you are just asking for trouble should you get pulled and alcohol is smelled whether you are within range or not man. Wait until you are done for the night is your best bet.
(By the way, you can't have alcohol in your commercial vehicle, just so you know cause I know some people say that you can if...blah blah blah)
For the precise amount of time it depends on factors. What are you drinking? How much do you weigh? Go here to get that calculation.
when i first started driving we were told 8 hrs after each drink. but nowe theres a percent based on body weight plus amount drinking....or something like that.