Hours of Service Explained: The 11-, 14- and 60/70-Hour Rules, With Worked Examples

Hours-of-service violations are among the most common findings in roadside inspections and audits, and most of them aren’t drivers deliberately pushing it. They come from misunderstanding how the limits interact — especially the 14-hour window, which keeps running no matter what the driver is doing.

This guide covers the rules for property-carrying drivers in 49 CFR 395.3. Passenger carriers have a different set of limits (10 hours driving, 15 hours on duty), so don’t apply these numbers to buses.

The four limits at a glance

The 14-hour window doesn’t stop

The window starts when the driver begins any kind of work — not when the wheels start turning — and it runs for 14 consecutive hours. Lunch breaks, fuel stops, detention at a shipper and off-duty time all count against it. Once the 14th hour passes, the driver can’t drive again until they’ve had 10 consecutive hours off duty, even if they have driving hours left.

The window doesn’t limit work — a driver can still do paperwork or help unload after hour 14. It limits driving.

The 30-minute break

A driver needs a 30-consecutive-minute interruption before driving beyond 8 cumulative hours. Since the 2020 changes, that break can be off duty, in the sleeper berth, or on duty not driving — so 30 minutes spent fueling or waiting at a dock counts. What doesn’t count is driving, or a break broken into pieces shorter than 30 minutes.

Worked examples

Example 1: legal day with the break built in

A driver comes on duty at 6:00 a.m. and does a pre-trip inspection. They drive 6:15–11:15 (5 hours), then spend 11:15–1:00 on duty loading. They drive 1:00–5:00 (4 more hours, 9 total) and go off duty at 5:15.

• Driving: 9 hours — under 11. OK.
• Window: ended at 5:15 p.m., before 8:00 p.m. OK.
• Break: the loading time was more than 30 minutes of on-duty, not driving time before the 8th driving hour. OK.

Example 2: the detention trap (14-hour violation)

A driver comes on duty at 5:00 a.m., drives 4 hours, then waits at a receiver from 9:00 a.m. to 4:00 p.m. They’re released and drive from 4:00 to 7:30 p.m.

They’ve driven only 7.5 hours — well under 11 — but their window closed at 7:00 p.m. The last 30 minutes of driving is a 14-hour violation. Detention is the single most common cause of this one, and the fix is planning: when a load is delayed, someone needs to check the window before dispatching the next leg.

Example 3: the missed break

A driver drives 6:00 a.m. to 12:00 p.m., takes a 20-minute stop, then drives 12:20 to 3:00 p.m. By 2:20 they’ve driven 8 cumulative hours without a single 30-minute interruption — the 20-minute stop doesn’t qualify. Every minute of driving after 2:20 is a break violation.

Example 4: the weekly limit

A carrier that operates every day of the week uses the 70-hour/8-day rule. A driver’s on-duty hours over the past seven days were 11, 12, 10, 12, 11, 7 and 6 — 69 hours. Under a rolling 8-day window, today they can work only until they reach 70 hours across the last 8 days, which leaves them very little. Once the oldest day drops off the window tomorrow, hours become available again.

Alternatively, a 34-hour restart — 34 or more consecutive hours off duty — resets the 60/70-hour clock to zero.

The flexibility the rules allow

Sleeper berth split

Drivers with a sleeper berth can split their 10-hour off-duty requirement into two periods: one of at least 7 hours in the sleeper berth, and another of at least 2 hours (off duty or in the sleeper), totalling at least 10. When paired correctly, neither qualifying period counts against the 14-hour window. This is the most frequently misapplied rule in Part 395 — if your drivers use splits, make sure your ELD calculates them and someone reviews them.

Adverse driving conditions

When a driver runs into conditions they couldn’t have known about at dispatch — unexpected snow, a road closure from a crash — they can extend both the 11-hour driving limit and the 14-hour window by up to 2 hours to reach a safe place or finish the run. Known weather forecasts and normal rush-hour traffic don’t qualify.

Short-haul exception

Drivers who stay within a 150 air-mile radius, return to their work reporting location, and are released within 14 hours can use time records instead of logs or an ELD. If a driver goes outside those conditions, they need a log for that day.

What auditors check

• Violations of each limit — 11-hour, 14-hour, break and 60/70.
• False logs, by comparing records of duty status against fuel receipts, toll records, bills of lading and dispatch records.
• Unassigned driving time on ELDs that nobody has reviewed or assigned.
• Retention — records of duty status and supporting documents must be kept for six months.

Make violations visible before they become patterns

Your ELD already records violations. The gap in most small fleets is that nobody reviews them until an auditor does. TruckComply’s compliance score treats unresolved hours-of-service violations as part of your overall picture, next to driver files, testing and vehicle records — so they get looked at as routinely as an expiring medical card.