The original concept for MOVES assumed that there would be some VMT not accounted for in the other four road types. This remaining VMT would be accounted for in roadTypeID=1. As the model developed, it was decided that all VMT must be accounted for in the explicit road types and none of the VMT could occur in roadTypeID=1 (off-network).
However, the code still expects there to be hour VMT and day VMT fractions for all the road types (including roadTypeID=1). Changing these temporal distributions for the off network road type should not affect the results.