FMCSA Hours-of-Service Rules Explained (and How Carriers Cheat Them)

Driver fatigue is a contributing factor in roughly 13% of large-truck crashes according to the FMCSA Large Truck Crash Causation Study — and researchers consider that figure significantly underreported. Most of that fatigue traces back to a single root cause: hours-of-service (HOS) violations.

The core HOS rules

Under 49 CFR §395.3, a property-carrying commercial driver may:

• Drive up to 11 hours after 10 consecutive hours off duty.
• Not drive beyond the 14th consecutive hour after coming on duty.
• Take a 30-minute break after 8 cumulative hours of driving time.
• Not exceed 60 hours on duty in 7 consecutive days, or 70 in 8 days.

How carriers cheat (even with ELDs)

Electronic logging devices were supposed to end paper-log falsification. They didn't end the underlying pressure to drive past safe limits — they just moved how the cheating happens.

• Editing the log to mis-categorize driving time as "on-duty not driving."
• Coaching drivers to log the truck as in the shop while still moving freight ("personal conveyance" abuse).
• Two drivers sharing one login.
• Dispatcher pressure that forces drivers to choose between HOS compliance and keeping the job.
• Carriers paying by the mile rather than the hour — a structural incentive to push past limits.

How we prove HOS violations in court

ELD data is the starting point. We pair it with: fuel and toll records, GPS pings, weigh-station logs, dashcam timestamps, dispatch text messages, and the driver's phone records. Cross-referencing these is how falsified logs get exposed.