Trucking, CDL & FMCSA Compliance Glossary

FMCSA & DOT Compliance

Driver Qualification File (DQF) (49 CFR §391.51): The file a motor carrier must keep for every driver it employs, documenting that the driver is qualified to operate a commercial motor vehicle. A complete DQF includes the employment application, the motor vehicle record, the road test certificate (or equivalent), the annual review of driving record, the medical examiner's certificate, and the safety performance history from previous employers. FMCSA auditors review the DQF during a compliance review, and a missing or incomplete file is one of the most common violations cited.
FMCSA Drug & Alcohol Clearinghouse (49 CFR Part 382 Subpart G): A secure online database run by FMCSA that holds records of commercial driver drug and alcohol program violations. Carriers must run a full pre-employment query before hiring a CDL driver and a limited query at least once a year for current drivers. A driver with an unresolved violation in the Clearinghouse is prohibited from performing safety-sensitive functions until they complete the return-to-duty process.
Hours of Service (HOS) (49 CFR Part 395): The federal rules limiting how long a commercial driver may drive and work before taking off-duty rest. For most property-carrying drivers the core limits are an 11-hour driving limit, a 14-hour on-duty window, a required 30-minute break, and a 60/70-hour limit over 7 or 8 days. HOS compliance is tracked with an electronic logging device and is a frequent factor in CSA scores and roadside inspections.
Electronic Logging Device (ELD) (49 CFR Part 395 Subpart B): A device connected to a vehicle's engine that automatically records driving time to enforce Hours of Service rules. The ELD mandate requires most interstate commercial drivers who keep records of duty status to use a registered, self-certified device. ELDs replaced paper logbooks and make it far harder to falsify driving hours.
Compliance, Safety, Accountability (CSA) (FMCSA Safety Measurement System): FMCSA's safety enforcement and monitoring program. CSA uses the Safety Measurement System to score carriers in seven BASIC categories (such as Unsafe Driving, HOS Compliance, and Vehicle Maintenance) based on roadside inspections and crash data from the prior 24 months. High CSA scores can trigger warning letters, investigations, and interventions, and they affect a carrier's insurance and freight opportunities.
Safety Rating (49 CFR Part 385): The rating FMCSA assigns a carrier after a compliance review: Satisfactory, Conditional, or Unsatisfactory. An Unsatisfactory rating bars a carrier from operating in interstate commerce. A carrier with no rating is shown as 'Not Rated' or 'None' in SAFER, which is common for newer or never-audited carriers.
DOT Medical Card (Medical Examiner's Certificate) (49 CFR §391.43): Proof that a commercial driver has passed a DOT physical performed by a certified medical examiner on the FMCSA National Registry. The certificate is typically valid for up to 24 months, though conditions like high blood pressure can shorten it. A current med card is required for the driver to remain qualified, and a copy must be kept in the Driver Qualification File.
Operating Authority (MC Number): FMCSA-granted permission for a carrier to transport regulated commodities or passengers for hire in interstate commerce, identified by a Motor Carrier (MC) number. Carriers that haul their own goods or operate only intrastate may not need an MC number, but for-hire interstate carriers must have active authority and the required insurance on file.
USDOT Number: A unique identifier FMCSA assigns to a commercial vehicle operator. It is used to collect and monitor a carrier's safety information through inspections, crash investigations, compliance reviews, and audits. Almost every carrier operating commercial vehicles in interstate commerce must have an active USDOT number.

Driver History & Screening

DAC Report (Drive-A-Check): A consumer report, produced by HireRight, that aggregates a commercial driver's employment history, work record, and termination reasons as reported by prior carriers. Carriers pull the DAC during pre-employment screening. Because it is an FCRA-regulated consumer report, drivers have the right to see it, dispute inaccurate entries, and receive an adverse action notice if they are turned down because of it.
Pre-Employment Screening Program (PSP): An FMCSA program that lets carriers (with the driver's consent) view a driver's five years of crash data and three years of roadside inspection history pulled directly from the federal MCMIS database. PSP is widely used in hiring because it shows a driver's actual inspection and violation record rather than self-reported history.
Motor Vehicle Record (MVR) (49 CFR §391.25): A driver's state-issued driving history, listing license status, endorsements, traffic convictions, and license suspensions. Carriers must obtain an MVR at hire and review it at least annually for each driver. Continuous MVR monitoring services can alert a carrier the moment a new violation posts.
Safety Performance History (§391.23) (49 CFR §391.23): The investigation a carrier must make into a new driver's previous three years of employment, including DOT-regulated drug and alcohol testing history and any accidents. Previous employers are required to respond to these inquiries. The documented responses become part of the Driver Qualification File and are a frequent audit checkpoint.
Fair Credit Reporting Act (FCRA): The federal law governing how consumer reports, including the DAC and background checks used in driver hiring, may be obtained and used. Under the FCRA a carrier must get the driver's written authorization, provide a pre-adverse action notice with a copy of the report before rejecting an applicant, and send a final adverse action notice. FCRA violations are a major source of trucking-industry litigation.
Adverse Action: Under the FCRA, the steps an employer must follow before and after denying employment based on a background or consumer report. The employer must first send a pre-adverse action notice with a copy of the report and a Summary of Rights, wait a reasonable period (commonly about five business days) so the applicant can dispute errors, and then send a final adverse action notice if the decision stands.
DataQs: FMCSA's online system for challenging the accuracy of federal safety records, such as an inspection or crash that was recorded incorrectly or wasn't the carrier's fault. A successful DataQs challenge, called a Request for Data Review, can remove or correct an entry that is hurting a carrier's CSA scores.
SAFER (Safety and Fitness Electronic Records): The public FMCSA system that lets anyone look up a carrier's snapshot: USDOT and MC numbers, fleet size, safety rating, insurance status, and basic inspection and crash summaries. SAFER is the most common starting point for verifying whether a trucking company is a legitimate, active carrier.

Driver Pay & Job Terms

Owner-Operator: A driver who owns (or leases) their truck and operates as an independent business, either under their own authority or leased onto a carrier. Owner-operators earn more per mile than company drivers but pay their own fuel, maintenance, insurance, and taxes, so net income depends heavily on cost control and freight rates.
Company Driver: A driver who is a W-2 employee of a carrier and drives the company's truck. The carrier covers fuel, maintenance, insurance, and tolls, and the driver is typically paid by the mile, by the hour, or with a percentage of the load. Company drivers trade the higher earning ceiling of an owner-operator for lower risk and fewer expenses.
Over-the-Road (OTR): Long-haul trucking where the driver is away from home for extended periods, often one to three weeks at a time, covering long distances across regions or coast to coast. OTR jobs usually pay more per mile than regional or local work but offer the least home time.
Cents Per Mile (CPM): The most common pay structure for company drivers, expressed as cents paid per mile driven. CPM rates vary with experience, freight type, and region, and may be split into loaded and empty (deadhead) rates. Because CPM only pays for miles, time spent loading, unloading, or waiting is often unpaid unless detention pay applies.
Detention Pay: Compensation a driver receives when they are held at a shipper or receiver beyond a set free period (often two hours) waiting to load or unload. Detention pay rates and the rules for claiming them vary widely by carrier, and unpaid detention is one of the most common driver complaints.
Deadhead: Driving an empty trailer between a delivery and the next pickup. Deadhead miles burn fuel and time without hauling revenue freight, so carriers try to minimize them. Some pay structures pay a lower rate for deadhead miles or none at all, which affects a driver's real take-home pay.
Drop and Hook: A freight operation where a driver drops a loaded or empty trailer and immediately hooks to a pre-loaded one, instead of waiting for the trailer to be loaded or unloaded (live load/unload). Drop and hook saves time and reduces detention, which is why drivers often prefer accounts that run this way.
Per Diem: A daily allowance to cover meals and incidental expenses while a driver is away from home. In trucking, per diem can be paid by the carrier or claimed as a tax deduction by eligible drivers under IRS rules. Carrier-administered per diem lowers taxable income but can also reduce reported gross wages, which may affect loans or benefits.
Reefer: A refrigerated trailer (and the freight that moves in it) used to haul temperature-controlled goods like produce, meat, and frozen food. Reefer freight typically pays more than dry van but requires monitoring temperature settings and dealing with stricter receiving requirements.
CDL Endorsements (49 CFR Part 383): Additional qualifications added to a commercial driver's license that authorize specific cargo or vehicle types: H (hazardous materials), N (tank vehicles), T (double/triple trailers), P (passenger), S (school bus), and X (combined HazMat and tank). Endorsements usually require extra knowledge tests, and HazMat requires a TSA background check. Drivers with in-demand endorsements typically command higher pay.

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