What Are FMCSA Hours-of-Service Rules?

The Federal Motor Carrier Safety Administration (FMCSA) enforces strict hours-of-service (HOS) regulations that limit how long commercial truck drivers can operate their vehicles. These rules exist for one reason: to prevent fatigued driving, which is one of the leading causes of fatal truck accidents in the United States.

Despite these regulations, trucking companies routinely pressure their drivers to exceed legal driving limits to meet delivery deadlines. When a fatigued truck driver causes an accident, both the driver and the trucking company can be held liable for the resulting injuries and damages.

Current FMCSA Hours-of-Service Limits

The FMCSA imposes the following driving limits on commercial motor vehicle (CMV) operators:

The 11-Hour Driving Limit

A truck driver may drive a maximum of 11 hours after 10 consecutive hours off duty. This means that even during a maximum-length shift, a driver must have had a full 10-hour rest break before getting behind the wheel.

The 14-Hour Window

All driving must occur within a 14-hour window after coming on duty. Once 14 hours have elapsed since the driver came on duty, no further driving is permitted — even if the driver has not used all 11 driving hours.

The 30-Minute Break Rule

Drivers must take a 30-minute break after 8 cumulative hours of driving time. This break can be satisfied by any non-driving period of 30 consecutive minutes.

The 60/70-Hour Limit

Truck drivers may not drive after 60 hours on duty in 7 consecutive days, or 70 hours on duty in 8 consecutive days. This weekly limit prevents drivers from working excessive hours over extended periods.

The 34-Hour Restart

Drivers can restart their 60/70-hour clock by taking 34 or more consecutive hours off duty.

How Do Trucking Companies Violate HOS Rules?

Despite the introduction of mandatory Electronic Logging Devices (ELDs) in 2017, HOS violations remain widespread. Common methods of cheating include:

• Running two logbooks: Some drivers maintain separate paper logs to hide excessive driving hours
• ELD manipulation: Drivers may log driving time as “off-duty” or “sleeper berth” while actually operating the vehicle
• Using a co-driver’s credentials: Swapping ELD logins between drivers to mask individual HOS violations
• Employer pressure: Trucking companies setting unrealistic delivery schedules that cannot be met without violating HOS rules
• Independent contractor misclassification: Companies classifying drivers as independent contractors to avoid direct HOS compliance oversight

The Deadly Consequences of Fatigued Driving

According to the National Highway Traffic Safety Administration (NHTSA), drowsy driving is a factor in approximately 100,000 crashes annually. For truck drivers operating 80,000-pound vehicles, the consequences are often catastrophic:

• Slower reaction times: A fatigued driver’s reaction time can be comparable to that of an intoxicated driver
• Microsleeps: Brief involuntary episodes of sleep lasting 4-5 seconds — at highway speeds, a truck travels the length of a football field during a microsleep
• Impaired judgment: Fatigue reduces a driver’s ability to assess dangerous situations and respond appropriately
• Lane departure: Fatigued drivers are more likely to drift out of their lane, causing head-on collisions or sideswipe accidents

How an Attorney Proves HOS Violations

Proving that a truck driver violated hours-of-service rules requires immediate action and specialized legal knowledge. At Siddons Law Firm, our truck accident investigation process includes:

Obtaining ELD Data

We immediately send a preservation letter to the trucking company demanding they retain all electronic logging data, GPS records, and dispatch communications. Under FMCSA regulations, carriers must retain ELD records for at least six months.

Reviewing Driver Qualification Files

FMCSA requires trucking companies to maintain comprehensive driver qualification files including driving records, medical certificates, and employment history. These files can reveal patterns of violations.

Analyzing Dispatch Records

Dispatch logs and load assignment records can show whether the trucking company assigned loads that were impossible to deliver within legal HOS limits.

Examining the Truck Driver’s History

We search the FMCSA’s Safety Measurement System (SMS) database for the carrier’s safety record and any prior HOS violations by the driver or company.

Compensation in HOS Violation Truck Accident Cases

When a trucking company knowingly allows or encourages HOS violations, victims may be entitled to both compensatory and punitive damages. Compensatory damages cover medical bills, lost wages, pain and suffering, and other tangible losses. Punitive damages are designed to punish the trucking company for its reckless disregard of safety regulations.

Cases involving provable HOS violations often result in significantly higher settlements and verdicts because they demonstrate clear negligence on the part of both the driver and the carrier.

Contact a Truck Accident Attorney Today

If you suspect a fatigued truck driver caused your accident, time is critical. ELD data can be overwritten, and trucking companies move quickly to protect their interests. Contact Siddons Law Firm at 610-255-7500 for a free consultation. We serve truck accident victims throughout Pennsylvania, New Jersey, Maryland, and New York.