After obtaining 10 hours of rest in two separate periods, does the driver have a full 11 and 14 hours available?

No. Under the federal hours-of-service rules, the driver of a property-carrying commercial motor vehicle who splits his/her required 10 hours of off-duty time into two separate “qualifying” rest periods does not have a full 11 and 14 hours available after completing the second rest period. Rather, to calculate how many hours are available, the driver must look back to the end of the first qualifying rest break and count forward, subtracting all driving time from 11 and subtracting all time — except the second qualifying rest break — from 14.

For example, suppose a driver (after 10 hours off) drives for 7 hours, sleeps in a sleeper berth for 8 hours (the minimum required is 7 consecutive hours), drives for 4 more hours (reaching the 11-hour limit), and then goes off duty for 2 hours, thus satisfying the requirements of the split-sleeper provision. How many hours are now available? The driver looks back to the end of the first rest break (the 8-consecutive-hour sleeper period) and counts forward. The driving time (4 hours) must be subtracted from 11, and all time other than the 2-hour break (meaning only the 4 hours driving) must be subtracted from 14. That means the driver has 7 hours of driving available within a 10-hour window.