Running a trucking company means operating under one of the most heavily regulated frameworks in American business. The Federal Motor Carrier Safety Administration sets the rules, and carriers that do not follow them face fines, out-of-service orders, and in serious cases, loss of operating authority.

For carriers running 10 trucks or more, compliance is not a part-time job. It requires systems, tracking, and visibility into every driver and vehicle in the fleet. Understanding which FMCSA regulations matter most, and how to stay ahead of them, separates carriers that grow from those that get buried in violations and audits.

This guide covers the core FMCSA regulations for trucking companies and practical steps to maintain compliance without drowning in paperwork.

What Is FMCSA and Why It Matters

The Federal Motor Carrier Safety Administration is the agency within the U.S. Department of Transportation responsible for regulating the trucking industry. FMCSA's mission is reducing crashes, injuries, and fatalities involving commercial motor vehicles.

Every interstate carrier operating vehicles over 10,001 pounds must comply with FMCSA rules. This includes requirements for driver qualifications, hours of service, vehicle maintenance, drug testing, and insurance. Violations affect your CSA (Compliance, Safety, Accountability) scores, which brokers, shippers, and insurance companies check before doing business with you.

Carriers that treat FMCSA compliance as an afterthought often find themselves paying 20-30% more in insurance premiums, losing contracts with major shippers, and spending management time responding to audits instead of growing the business.

Core FMCSA Regulations for Trucking Companies

Hours of Service (HOS) Rules

Hours of service regulations limit how long drivers can operate commercial vehicles before taking mandatory rest. These rules exist to prevent fatigue-related crashes and are among the most frequently violated FMCSA regulations in trucking.

Key HOS limits for property-carrying drivers:

• 11-Hour Driving Limit: Maximum driving time after 10 consecutive hours off duty

• 14-Hour Limit: Cannot drive beyond the 14th consecutive hour after coming on duty

• 30-Minute Break: Required after 8 cumulative hours of driving

• 60/70-Hour Limit: Cannot drive after 60/70 hours on duty in 7/8 consecutive days

• 34-Hour Restart: Resets the 60/70-hour clock with 34 consecutive hours off duty

HOS violations are consistently among the most common DOT violations cited during roadside inspections. Proper ELD integration with your operations system helps dispatchers see remaining drive time before assigning loads, preventing violations before they happen.

Electronic Logging Device (ELD) Mandate

Since December 2019, most interstate carriers must use registered ELDs to record driver hours. Paper logs are no longer acceptable for the majority of operations. The ELD mandate applies to drivers who are required to keep records of duty status (RODS).

ELD compliance requirements:

• Device must be registered with FMCSA

• Must automatically record driving time when vehicle is in motion

• Data must be available for transfer to inspectors

• Drivers must receive training on proper use

• Carriers must have written ELD malfunction procedures

Carriers running multiple ELD providers across their fleet need systems that consolidate this data into a single view. A TMS for carriers with telematics integration pulls HOS data from 30+ ELD providers into one dashboard.

Driver Qualification File Requirements

Every driver operating a commercial motor vehicle must have a complete Driver Qualification (DQ) file maintained by the carrier. Missing or expired documents in DQ files are a common finding during FMCSA audits and can result in significant fines.

Required DQ file documents:

The new FMCSA electronic medical certification rules require medical examiners to report results electronically to FMCSA, which then transmits the data to state licensing agencies. This change means expired medical cards now trigger automatic CDL downgrades in many states.

Drug and Alcohol Testing Program

FMCSA requires carriers to maintain a drug and alcohol testing program that includes pre-employment testing, random testing, post-accident testing, reasonable suspicion testing, return-to-duty testing, and follow-up testing.

Key requirements:

• Minimum 50% of drivers randomly tested for drugs annually

• Minimum 10% of drivers randomly tested for alcohol annually

• Pre-employment drug test required before first safety-sensitive duty

• Carriers must query FMCSA Drug and Alcohol Clearinghouse for all driver hires

• Positive results must be reported to Clearinghouse within specific timeframes

The Drug and Alcohol Clearinghouse, launched in 2020, created a database of driver violations. Carriers must query the Clearinghouse before hiring any driver and conduct annual queries on current drivers. Failing to check the Clearinghouse before hiring is itself a violation.

Vehicle Maintenance and Inspection Requirements

FMCSA requires carriers to systematically inspect, repair, and maintain all commercial motor vehicles under their control. This includes keeping maintenance records, conducting regular inspections, and ensuring vehicles meet safety standards.

Required inspections and records:

• Pre-trip and post-trip inspections: Drivers must inspect vehicles before and after each trip

• Driver Vehicle Inspection Reports (DVIRs): Written reports required when defects are found

• Annual inspections: All CMVs must pass annual inspection by qualified inspector

• Maintenance records: Must be kept for each vehicle for its time in service plus 6 months

Brake and tire violations account for a significant portion of vehicle out-of-service orders. Tracking maintenance at the unit level helps carriers identify trucks that are becoming compliance risks before they fail a roadside inspection. Understanding your true cost per mile means including maintenance and compliance costs in the calculation.

Insurance Requirements

FMCSA sets minimum insurance requirements for motor carriers based on the type of freight transported. Operating without adequate insurance coverage can result in loss of operating authority.

Many shippers and brokers require coverage well above FMCSA minimums. Carriers with poor CSA scores often pay significantly higher premiums, making compliance a direct factor in the real costs of running a trucking company.

CSA Scores and Safety Measurement

FMCSA uses the Compliance, Safety, Accountability program to monitor carrier safety performance. CSA scores are calculated from roadside inspection results, crash reports, and investigation findings across seven Behavior Analysis and Safety Improvement Categories (BASICs).

The seven BASICs:

• Unsafe Driving

• Hours of Service Compliance

• Driver Fitness

• Controlled Substances and Alcohol

• Vehicle Maintenance

• Hazardous Materials Compliance

• Crash Indicator

High scores in any BASIC trigger FMCSA intervention, from warning letters to compliance reviews to potential shutdown orders. Brokers and shippers increasingly use CSA scores as a screening tool, meaning poor scores cost you freight before they cost you fines.

Monitoring the right operational metrics includes tracking your BASIC scores monthly and investigating any violations immediately. Carriers that review CSA data quarterly instead of monthly often miss trends until they become serious problems.

Staying Ahead of FMCSA Compliance

Carriers that maintain clean compliance records share common practices. They do not wait for audits or violations to force action.

Build systems that track automatically. Driver qualification files, medical card expirations, annual inspection dates, and drug testing schedules all need automated tracking. Carriers running 10 or more trucks cannot rely on spreadsheets to monitor dozens of expiration dates across drivers and vehicles.

Integrate ELD data with operations. When dispatchers can see a driver's remaining hours before assigning a load, HOS violations drop dramatically. AI-powered fleet management tools can flag potential violations before they happen.

Document everything digitally. Paper records get lost, damaged, and misfiled. Digital DVIRs through a driver mobile app create instant, searchable records that survive audits.

Review CSA scores monthly. Waiting for FMCSA to contact you means waiting too long. Monthly reviews let you spot trends and address them before intervention thresholds are crossed.

Carriers that fail in this industry often cite regulatory burden as a factor. But the carriers that succeed build compliance into their operations systems rather than treating it as a separate burden.

Make FMCSA Compliance Part of Your Operations

Datatruck is the carrier-first TMS with built-in compliance tracking, real-time analytics, and integrations with 30+ ELD providers. Track driver qualification dates automatically, monitor HOS data in one dashboard, and get alerts before documents expire.

Book a free demo and see how carriers are turning FMCSA compliance from a burden into a competitive advantage.