The On Duty period begins after at least 10 consecutive hours of Off-Duty/Sleeper/Waiting time.
Total shift time after taking consecutive 10 hours off would be 16 hours.
Driver must not drive more than 12 16 hours in a shift.
The cycle starts 8 days before the end of the current day.
Driver must not drive after 80 hours on duty/driving since the cycle started.
34-hour restarts are allowed at any time.
24-hour restart exception allows any 24+ hour Off Duty/Sleeper/Waiting to start a new cycle.
Split Sleeper Berth
Drivers need to take two breaks of a total of 10+ hours off, where one period is 8-10 hours sleeper, and the other is 2-10 hours off duty/sleeper, and restarts the shift after the first of the two periods.
The wait time exception adds a 5th status to the log chart, and any time spent waiting does not count towards the 16-hour shift limit.