Mugarolla
Light 'em up!
I can't see the FMCSA saying you can shift for 10 hours then go drive 4 or 6 hours and be OK. That's just not reasonable.
What's the difference if you shift for 10 hours or drive a forklift for 10 hours and then go drive for 4 hours on road.
The FMCSA does not have an issue with driving a forklift for 10 hours and then driving on road for 4 hours.
I've done both. Driving a forklift for 10 hours makes you more tired than shifting for 10 hours, but the FMCSA doesn't care.