What FMCSA Regulations Cover
The Federal Motor Carrier Safety Administration is part of the U.S. Department of Transportation and creates and enforces safety rules for commercial trucks and buses. These regulations cover everything from how trucks are built and maintained to how drivers must behave on the road. The main regulations are found in Title 49 of the Code of Federal Regulations, specifically in Parts 390 through 399. These rules apply to trucks that weigh over 10,000 pounds and carry goods or passengers across state lines.
Driver Qualifications and Licensing
Drivers of commercial trucks must meet strict requirements before they can operate vehicles. They must be at least 21 years old to drive interstate, pass a written test to get a Commercial Driver's License (CDL), and pass a Department of Transportation medical examination. Drivers must renew their medical certification every 1 to 2 years depending on their health conditions. The FMCSA also requires drivers to maintain a valid driving record and report any traffic violations or accidents.
Hours of Service Regulations
Federal law limits how many hours a truck driver can work to prevent fatigue-related accidents. Drivers cannot drive more than 11 hours in a single stretch and must take a 10-minute break after 8 hours of driving. Within a 14-hour period, drivers can work no more than 11 hours of driving time. Additionally, drivers must have 10 consecutive hours off-duty before starting a new workday. These rules reset either every 7 days or 8 days depending on which option a company chooses.
Vehicle Maintenance and Inspection
Commercial trucks must be properly maintained and inspected regularly to ensure they are safe to operate. Drivers are required to perform a pre-trip inspection before driving and a post-trip inspection after their route ends, checking important parts like brakes, lights, tires, and steering. Trucks must have a valid inspection certificate and any defects must be repaired before the vehicle returns to the road. The FMCSA has specific safety standards for all components of commercial vehicles.
Cargo Security and Weight Limits
Trucks must be loaded safely so cargo does not shift or fall off during transport. Federal regulations specify how cargo must be secured, and drivers are responsible for checking that loads are balanced and properly tied down. Federal law also sets weight limits for trucks, which vary by state but generally follow federal standards. Overweight vehicles are subject to fines and may be removed from service until weight is reduced to legal limits.
Drug and Alcohol Testing
All commercial truck drivers must undergo drug and alcohol testing as required by federal regulations. Testing occurs before hiring, after accidents, and randomly during employment. Drivers cannot operate a commercial vehicle with a blood alcohol level of 0.04 or higher, which is lower than the standard 0.08 for other drivers. Positive test results can result in disqualification from driving and loss of a CDL. 
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