For property-carrying drivers, from the federal rule (49 CFR 395.3 and 395.1):
- Start of the shift: you may not drive without first taking 10 consecutive hours off duty.
- 14-hour window: you may not drive after 14 consecutive hours from coming on duty.
- 11 hours: you may drive up to 11 hours inside that 14-hour window.
- 30-minute break: after 8 hours of driving you need a 30-minute break from driving. Off duty, sleeper berth or on-duty not driving time all count.
- 60/70: no driving after 60 hours on duty in 7 days (or 70 hours in 8 days if your carrier runs every day). A 34-hour off-duty period restarts the count.
- Sleeper split: you can make your 10 hours from two periods, one of at least 7 consecutive hours in the sleeper berth, neither shorter than 2 hours, together at least 10.
- Adverse driving conditions: up to 2 extra hours to finish the run or reach a safe place.
There are exceptions (short-haul, Alaska and others) in 395.1. Your carrier's ELD and your company rules apply too.