The regulations allow a CDL driver to drive 11 hours in one day. After the 11 hours are completed the driver is not allowed back on the road until after a 10 hour break. For drivers who are carrying passengers, the maximum length of driving is 10 hours, followed by an 8 hour break. It is important for the drivers to rest and move around so they may remain alert while driving. When driving as a CDL driver it is important to follow the rules set by the Federal Motor Carrier Safety Administration (FMCSA) on how many hours a CDL driver can drive.