Truck Driver Fatigue & Hours-of-Service Violations

😴 Federal law caps driving at 11 hours inside a 14-hour window — and the truck's own ELD data often proves the driver went past it.

This page explains what actually happens in driver fatigue & HOS violations, what usually causes them, who may be held responsible, and which evidence proves it — so you know what you're dealing with before you talk to anyone's insurance company. It is general information, not legal advice, but all of it reflects how these cases are really investigated.

What happens in a driver fatigue & HOS violations crash

Federal hours-of-service rules (49 CFR Part 395) cap property-carrying drivers at 11 hours of driving inside a 14-hour on-duty window, require a 30-minute break, and limit weekly on-duty time. The rules exist because fatigue impairs a driver in the same ways alcohol does — slower reactions, tunnel vision, microsleeps measured in seconds. A rig at 65 mph covers the length of a football field in about three seconds; a two-second microsleep is a crash. Since 2017, electronic logging devices (ELDs) have recorded driving time automatically, which means fatigue is no longer a matter of a driver's word: the violation is often sitting in the data, alongside dispatch records showing the schedule that demanded it.

Common causes

Investigations into driver fatigue & HOS violations keep returning to the same root causes:

• Driving beyond the 11-hour / 14-hour limits in 49 CFR Part 395
• Carrier pressure to meet unrealistic delivery windows
• Falsified or manipulated duty-status logs

Causes matter legally, not just mechanically: each one points to a different responsible party and a different set of federal rules that may have been violated. Our FMCSA violations guide explains how a broken safety rule strengthens a claim.

Who may be liable

Responsibility rarely stops with the person behind the wheel. In driver fatigue & HOS violations cases, attorneys typically investigate:

• The truck driver
• The motor carrier
• A broker or shipper that dictated an impossible schedule

Each of these parties may carry its own insurance policy, and federal minimum-coverage rules mean serious cases usually involve substantial coverage. The full liability chain — driver to carrier to broker, shipper, and maintenance contractors — is mapped in our liability guide.

The evidence that proves it

These cases are won with records, most of which start out in the trucking company's possession:

• ELD (electronic logging device) hours data
• Dispatch records and delivery schedules
• Fuel and toll receipts that contradict the logs

Some of this evidence — especially electronic data — can be overwritten in the normal course of business within days or weeks. Attorneys stop that clock with a preservation letter, usually the first thing they send. Read more in our black box & evidence guide.

Deadlines

Every state limits how long you have to bring an injury claim — from as little as one year in Tennessee to several years elsewhere. Find your state on our state pages for specifics.

Frequently asked questions