A large portion of Unassigned Driving segments occur during yard moves. To save time annotating unassigned segments within a geofence as Yard Move, you can designate the address type as a yard. After you set up the geofence, Samsara automatically annotates trips fully contained within the yard without a driver assigned as Yard Move.
Automatic annotation of unassigned segments will not automatically assign segments that were previously associated with a driver (for example, carrier edits that unassign drive time).
Navigate to Settings > Addresses/Geofences.
Edit an existing address or Add address if it doesn't exist.
Select the Address is a Yard.
Make sure that the geofence is only marked as a yard for a location where you know non-drivers (mechanics, washers, fuelers, etc.) operate vehicles.
Also, this should only be used for segments performed by non-driver operators. Normal unassigned segments should still be assigned to the appropriate individual drivers.
Save your changes.