DOT Hours of Service Rules Explained (2026): The 11-Hour, 14-Hour, and 70-Hour Limits

The Federal Motor Carrier Safety Administration’s Hours of Service (HOS) regulations exist for one reason: tired truck drivers crash more. The data is overwhelming — fatigue is implicated in 13% of fatal truck crashes and contributes to a far higher percentage of serious-injury crashes.

For truck accident plaintiffs, HOS violations are among the most valuable forms of evidence. A documented violation transforms an ordinary crash into one with substantially higher settlement potential — and in egregious cases, opens the door to punitive damages.

This guide explains the rules clearly, the exceptions that apply, and what the violations look like in practice.

The Four Clocks

Federal HOS rules establish four separate “clocks” that limit commercial driver activity. All four apply simultaneously.

Clock 1: 11-Hour Driving Limit

A commercial driver may not drive more than 11 hours after 10 consecutive hours off duty.

The 11 hours are cumulative driving time within the duty window. They don’t need to be consecutive. A driver can drive 5 hours, take a break, drive 6 more hours — that’s 11 total driving hours.

Clock 2: 14-Hour Duty Window

After coming on duty (driving or otherwise), the driver may not drive after the 14th consecutive hour. Driving is prohibited beyond the 14-hour mark even if the driver hasn’t reached the 11-hour driving limit.

The 14-hour clock doesn’t pause for breaks. A driver who starts the duty period at 6:00 AM cannot drive after 8:00 PM that day, regardless of break time taken.

Clock 3: 30-Minute Break Requirement

A driver must take a 30-minute break after 8 cumulative hours of driving time. The break can be off-duty, sleeper berth, or on-duty (not driving).

Clock 4: 60/70-Hour Weekly Limit

A driver may not be on duty more than:

• 60 hours in 7 consecutive days, if the carrier doesn’t operate every day, OR
• 70 hours in 8 consecutive days, if the carrier operates every day

The 70-hour clock can be “reset” by taking 34 consecutive hours off duty (the “34-hour restart”).

How the Clocks Interact

A practical scenario: a driver starts work Monday at 6:00 AM.

• By Monday 5:00 PM (11 hours later): driver has driven 11 hours, hits the 11-hour limit
• By Monday 8:00 PM (14 hours later): driver’s 14-hour duty window expires; cannot drive again
• Monday 8:00 PM – Tuesday 6:00 AM: 10 hours off duty (required minimum)
• Tuesday 6:00 AM: clocks reset; driver can drive 11 more hours

If this pattern repeats Monday through Saturday: 6 days × 14 hours on-duty = 84 hours, exceeding 70-hour weekly limit. Driver must take 34-hour restart before Sunday.

Exceptions

16-Hour Short-Haul Exception

Short-haul drivers (operating within 150 air miles of normal reporting location, returning to that location daily) may extend the 14-hour duty window to 16 hours once per week.

Adverse Driving Conditions Exception

Driving time may be extended by 2 hours (to 13 hours total) if unsafe driving conditions are encountered that couldn’t have been predicted at the start of the run (severe weather, accidents blocking traffic, etc.).

Sleeper Berth Provision

Drivers using sleeper berths may split the 10-hour off-duty period:

• One break of at least 7 hours in sleeper berth
• One break of at least 2 hours off-duty or sleeper berth
• Combined, these reset the 11-hour and 14-hour clocks

This provides operational flexibility for team drivers and long-haul operations.

Personal Conveyance

Driving the truck for personal purposes (commuting to lodging, going to restaurants) doesn’t count toward duty time — but is heavily regulated to prevent abuse.

Agricultural Hauling Exception

Drivers hauling agricultural commodities have looser HOS rules during planting/harvest periods, when operating within 150 air miles of the source.

Electronic Logging Devices (ELDs)

Since December 2017, most commercial drivers are required to use ELDs that automatically record driving time, duty status, and engine-on time. ELDs effectively eliminated paper log “creative arithmetic.”

ELD data is the cornerstone of HOS violation evidence in modern truck accident cases:

• Driving time per day
• Duty status changes (on-duty, off-duty, sleeper berth, driving)
• Engine on/off events
• Vehicle location at each duty status change
• Total cumulative hours within rolling windows

If your accident is investigated promptly (and a spoliation letter is sent quickly), ELD data is discoverable through litigation. Without preservation, motor carriers may destroy or “lose” ELD data within their retention windows (often 6 months).

HOS Violations in Practice

Common HOS violations discovered in truck accident litigation:

Driving Beyond 11 Hours

ELD shows driver in driving status for 11.5, 12, 13+ hours in the duty window. Direct violation. In serious-injury cases, this is often dispositive on negligence.

Driving Beyond 14-Hour Window

ELD shows driver in driving status after the 14-hour mark from start of duty. Direct violation.

Skipped 30-Minute Break

ELD shows continuous driving for 8+ hours without 30-minute break.

False Off-Duty Logging

Driver “logs off-duty” while waiting at shipper/receiver, then drives. ELD shows engine on/off events that contradict logged status.

Personal Conveyance Abuse

Driver uses personal conveyance to extend driving time beyond regulatory limits.

70-Hour Violation

Driver exceeds weekly cumulative duty hours, often near end of week.

How HOS Violations Affect Settlement Value

A documented HOS violation in a truck accident case typically increases settlement value 30–80%. Reasons:

Negligence Per Se

Many jurisdictions treat regulatory violations as automatic negligence — eliminating need to prove negligence separately. The accident is automatically attributable to the violation.

Causation Strength

HOS violations specifically address fatigue, which is causally linked to crash risk. Establishing causation between violation and accident is easier than typical negligence cases.

Punitive Damages Threshold

Egregious HOS violations — particularly patterns of falsification, dispatch pressure to violate rules, or violations involving fatalities — may meet state thresholds for punitive damages. Punitive damages can multiply settlement value 2–10×.

Carrier Liability

Pattern violations expose the motor carrier to “negligent hiring/training/supervision” liability beyond the driver’s individual fault. The deeper-pocketed carrier becomes liable for systemic safety failures.

Insurance Settlement Pressure

Trucking insurers settle HOS-violation cases higher and faster specifically to avoid jury trials that highlight regulatory violations.

Common Patterns of Violation

Driver-Initiated

• Solo driver pressured by tight delivery schedule
• Driver maximizing earnings through more miles
• Driver new to industry, uncertain about regulations

Carrier-Initiated

• Dispatch routing that requires HOS violation to complete on schedule
• Pay structure rewarding miles driven (incentivizing violation)
• Inadequate training on HOS rules
• Pressure from shippers/receivers to “make the appointment”
• Manipulated ELD data (rare but documented)

Carrier-initiated patterns are particularly valuable in litigation because they expand liability to the carrier and may support punitive damages.

What Plaintiffs Should Know

Spoliation Letter is Critical

HOS violations can only be proven if ELD data is preserved. Send a formal spoliation letter to the motor carrier within 14 days of the accident demanding preservation of:

• All ELD data for the involved driver covering 30 days before accident through accident date
• All driver qualification files
• All employment records for the driver
• All dispatch communications
• All training records
• All prior HOS violation citations or audit reports

Without spoliation notice, this evidence can legally be destroyed within retention windows.

Don’t Assume “No Violation” Without Investigating

Many serious truck accident cases reveal HOS violations only during discovery. Initial driver statements often claim “I was within hours” — ELD data sometimes contradicts that completely. Investigation is required.

Connecting HOS to Crash Causation

A documented HOS violation isn’t automatically settlement-altering. The legal connection requires showing:

• The violation existed
• The violation contributed to fatigue or impairment
• The fatigue or impairment contributed to the crash

Expert testimony from trucking safety consultants typically connects these dots.

HOS Compliance from the Industry Side

Most professional truckers and reputable carriers are HOS-compliant. The industry has invested heavily in ELD compliance since 2017. Violations are concentrated in:

• Smaller carriers (less compliance infrastructure)
• Owner-operators under economic pressure
• New entrants without established compliance practices
• Specific industry segments under tight delivery pressure (just-in-time delivery, hazmat with regulated schedules)

For plaintiffs, the rate of finding violations in serious-injury cases involves these higher-risk segments more often than the industry average.

How to Use This Information

If you’ve been in a truck accident:

1. Engage an attorney within 14 days so a spoliation letter can be sent in time
2. Document the truck’s USDOT number — this allows lookup in the FMCSA database
3. Check the carrier’s safety record at SAFER (https://safer.fmcsa.dot.gov/CompanyProfile.aspx) — prior HOS violations are public
4. Note any driver statements about their schedule, hours, or fatigue at the scene
5. Preserve all of your own evidence (photos, witness contacts, your own driving log if you’re a driver)

If HOS violations are discovered in your case, settlement value typically increases substantially. Use our settlement calculator for a base estimate; a knowledgeable attorney can model the additional value from documented violations.

Frequently Asked Questions

How can I find out if the truck driver was in compliance?

Most easily, through legal discovery after a spoliation letter is sent. Without legal process, ELD data isn’t publicly available — but the carrier’s prior FMCSA violation history is, through the SAFER database.

Do HOS rules apply to all commercial trucks?

Most commercial motor vehicles weighing over 10,000 pounds carrying property in interstate commerce. There are specific exemptions (agricultural, intrastate-only with certain exceptions, certain government vehicles). Most semis and large box trucks are subject to HOS.

Does an HOS violation automatically win my case?

No, but it dramatically strengthens it. The violation must still be causally connected to the crash (the fatigue from the violation contributed to the cause). However, the negligence-per-se doctrine in many states makes this connection significantly easier to establish.

Are personal use exemptions abused?

Yes, frequently. “Personal conveyance” allows drivers to use the truck for personal purposes off-duty. But many drivers use personal conveyance status to extend driving time inappropriately. Discovery often reveals personal conveyance abuse contributing to fatigue at the time of crash.

Can I look up specific drivers’ HOS history?

Individual driver records are not publicly available. However, the motor carrier’s safety record, including HOS violation patterns, is public via SAFER.

For settlement estimation, including potential value increase from HOS violations, see our calculator. For state-specific legal procedure, see your state guide.