How many hours of sleep do you need if you have a cdl?

There's no regulations on how much you actually need to spend sleeping, although you do need to use good judgment in that arena. A CDL driver does a morning pre-trip. From that point, they have 14 hours to complete all of their driving. Within that 14 hour period, they are permitted to drive for 11 hours, after which, they are required to take a 10 hour break.