How long can a driver drive?

DOT regulations state that a driver can be on duty driving no more than 10 hours.  Our motor coaches all have Electronic Logging Devices.  The driver signs on before they start the vehicle, so while planning consider any time that the motor coach is running as part of that 10 hours.  Plan for your driver to be off duty a minimum of 9 hours each night of your trip.  Avoid late nights followed by early mornings.