These are the main clocks we have to go by in a nutshell.
11-Hour Driving Limit
May drive a maximum of 11 hours after 10 consecutive hours off duty.
May not drive beyond the 14th consecutive hour after coming on duty, following 10 consecutive hours off duty. Off-duty time does not extend the 14-hour period.
May drive only if 8 hours or less have passed since end of driver’s last off-duty or sleeper berth period of at least 30 minutes. Does not apply to drivers using either of the short-haul exceptions in 395.1(e). [49 CFR 397.5 mandatory “in attendance” time may be included in break if no other duties performed]
May not drive after 70 hours on duty in 8 consecutive days. A driver may restart a 8 consecutive day period after taking 34 or more consecutive hours off duty.