Hello @JMarc-1806 ,
Thank you for asking your question in our community. The 8/2 (or 7/3) hour split sleeper will extend the 14 hour workday window but it will not extend the driving limit. Once the short portion of the split sleeper (2+ hours in SB/OFF) has been completed a new workday will be recalculated from the end of the first split. Due to the changes to the Final Rule (Sept. 2020) drivers who successfully split their sleep can exclude both the 'small part' and the 'large part' of their split from the workday. Due to this, the driver must advise the system they are planning on splitting in order for the system to accurately predict availability.
Example. A driver who started their day at noon, takes a 2 hour OFF duty period starting at 5pm. At the end of this 2hr period (7pm), they simultaneously have 2 different workday availabilities:
7 hours of workday if they are NOT completing a split, OR
9 hours of workday if they ARE completing a split.
In order to show the driver the correct availability the system will look at the ruleset they have currently chosen. Rulesets including 'with Split Sleeper' will always assume the driver is going to Split Sleep whenever possible, and as such, will calculate availability as if the driver will pair viable periods together. This means that the driver may need to complete a split pairing when their availability runs to zero. Drivers are expected to know the rules and requirements of split sleeping if they have chosen this ruleset.
If a driver is not going to complete Split Sleep, and they have chosen a 'with Split Sleeper' ruleset - they do risk a violation appearing in the past if they do not complete a split that the system anticipated. In this scenario, the driver should select the applicable ruleset option that does not include 'with Split Sleeper'
I hope this explanation of how the rule works help you. If you still have any questions or think that the system is not working as intended please feel free to share your logs here and I can take a look at them.
Have a good one!
Eishi FUN