Federal Trucking Regulations
The Federal Motor Carrier Safety Administration (FMCSA) enforces strict regulations on commercial trucking. When a trucking company or driver violates these rules and causes an accident, it can be powerful evidence of negligence in your case.
Hours of Service (HOS) Rules
Federal law limits commercial truck drivers to 11 hours of driving within a 14-hour window after 10 consecutive hours off duty. Drivers must take a mandatory 30-minute break after 8 hours of driving. The 60/70-hour rule limits total on-duty time to 60 hours in 7 days or 70 hours in 8 days. Electronic Logging Devices (ELDs) are required to track compliance. HOS violations are among the most common factors in drowsy driving truck accidents.
Electronic Logging Device (ELD) Mandate
Since December 2017, most commercial trucks are required to use ELDs to automatically record driving time. ELD data is critical evidence in truck accident cases because it can prove whether a driver exceeded legal driving hours. Trucking companies are required to preserve ELD data, and your attorney can subpoena this information during litigation.
Vehicle Maintenance and Inspection Requirements
FMCSA regulations require trucking companies to systematically inspect, repair, and maintain all commercial vehicles. Drivers must conduct pre-trip and post-trip inspections and document any defects. Annual inspections by qualified mechanics are mandatory. Brake systems, tires, lights, steering, and coupling devices must meet specific safety standards. Maintenance violations — especially brake defects — are the most common findings during roadside inspections.
Cargo Securement Standards
Federal regulations establish detailed requirements for securing cargo on commercial vehicles. Cargo must be firmly immobilized or secured using tiedowns, blocking, bracing, or a combination of methods. Specific rules apply to different types of cargo including logs, metal coils, paper rolls, and intermodal containers. The maximum gross weight for a standard tractor-trailer is 80,000 pounds, and overweight violations create additional liability.
Drug and Alcohol Testing Program
FMCSA requires drug and alcohol testing for all commercial motor vehicle drivers. Testing is required before employment, after accidents, upon reasonable suspicion, randomly, and upon return to duty. The legal blood alcohol concentration (BAC) limit for commercial drivers is 0.04% — half the standard 0.08% limit. Positive test results or refusals to test are recorded in the FMCSA Clearinghouse database.
Driver Qualification Standards
Commercial truck drivers must hold a valid Commercial Driver's License (CDL) with appropriate endorsements for their vehicle type. Drivers must be at least 21 years old for interstate commerce. Medical certification is required, with physical examinations every 24 months. Drivers must meet vision, hearing, and physical fitness requirements. Carriers must maintain driver qualification files including driving records, employment history, and road test results.
Carrier Safety Ratings and CSA Scores
The FMCSA assigns safety ratings (Satisfactory, Conditional, Unsatisfactory) to motor carriers based on compliance reviews. The Compliance, Safety, Accountability (CSA) program uses the Safety Measurement System (SMS) to monitor carrier performance across seven categories. Carriers with poor safety records can face intervention, fines, or shutdown orders. A trucking company's poor safety rating can be powerful evidence of negligence in a truck accident lawsuit.
Hazardous Materials (HazMat) Regulations
Drivers transporting hazardous materials must have a HazMat endorsement on their CDL, which requires a TSA background check. Specific packaging, labeling, placarding, and documentation requirements apply. Hazmat vehicles have restricted routes and must comply with additional parking and attendance rules. In the event of a hazmat spill, the carrier faces additional liability for environmental cleanup and exposure injuries.
How Regulation Violations Affect Your Case
When a trucking company or driver violates FMCSA regulations and that violation contributes to your accident, it establishes a strong foundation for negligence. Federal regulation violations can also support claims for negligence per se — meaning the violation itself is considered proof of negligence in many states.
An experienced truck accident attorney will investigate whether the driver or carrier violated any of these regulations by obtaining driver logs, ELD data, maintenance records, drug test results, and the carrier's safety history. This evidence is critical and must be preserved quickly, as trucking companies are only required to retain certain records for limited periods.
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