The hours-of-service exemptions seem to be a constant source of confusion. In this quiz, we’re going to test your knowledge of some of the most common exemptions. Click below to see answers.

1. What is the “safe-harbor” provision in the hours-of-service regulations?
   1. A driver can go over a limit if trying to find a safe place to park.
   2. A driver can drive an extra two hours if the driver is delayed during the day.
   3. A driver can disregard the hours-of-service limits in specific cities.
   4. There is no safe-harbor provision in the hours-of-service regulations.
2. A driver can use the adverse driving conditions exemption if:
   1. The condition was not a road, weather, or traffic condition.
   2. The condition could not be known at the time of dispatch and at the start of the driver’s day.
   3. The condition involved a scheduled delay.
   4. The condition involved a delay at a shipper or receiver.
3. A driver can use the 16-hour exemption at 395.1(o):
   1. As many times as needed.
   2. Only when operating a passenger-carrying vehicle.
   3. Once in a seven-day period or once since the driver’s last restart.
   4. Twice every 14 days.
4. A driver using the split-sleeper exemption:
   1. Has a full 11 and 14 hours available after a 7-hour sleeper break.
   2. Can drive up to 20 hours per day.
   3. Must subtract hours used before each qualifying break from the 11- and 14-hour limits to determine the hours available.
   4. Can only count sleeper-berth periods as qualifying breaks.