DOT & TRUCKING COMPLIANCE GLOSSARY
Navigating the trucking industry can feel overwhelming with so many regulations, acronyms, and compliance terms to understand. That’s why we created this DOT & Trucking Compliance Glossary: a simple, reliable resource designed to help carriers, owner-operators, and trucking companies better understand the language of compliance.
As your Carrier Advocate, our goal is to make compliance easier, clearer, and less stressful. Whether you’re starting a new trucking company, preparing for an audit, managing driver files, or simply trying to stay informed, this glossary gives you quick access to important DOT and FMCSA terminology in one convenient place.
A
Accident Register
A required FMCSA record documenting accidents involving commercial motor vehicles, including dates, injuries, fatalities, and hazardous material releases.
Apportioned Plates
Commercial license plates issued under the International Registration Plan (IRP) allowing interstate operation across multiple jurisdictions.
Audit
An FMCSA review of a trucking company’s compliance records, safety practices, and operational procedures.
B
BASIC Scores
Behavior Analysis and Safety Improvement Categories used within the FMCSA CSA Safety Measurement System.
BOC-3 Filing
A federal filing designating process agents in each state to receive legal documents on behalf of interstate motor carriers.
Broker Authority
FMCSA operating authority allowing companies to arrange freight transportation without operating trucks themselves.
C
Carrier
A trucking company or individual operating commercial vehicles to transport freight or passengers.
CDL (Commercial Driver’s License)
A special driver’s license required to operate certain commercial motor vehicles.
Clearinghouse
The FMCSA Drug & Alcohol Clearinghouse database tracking CDL driver drug and alcohol violations and return-to-duty status.
Compliance Review
A detailed FMCSA audit evaluating a carrier’s safety management and regulatory compliance.
Consortium
A third-party administrator managing DOT drug and alcohol testing programs for trucking companies and owner-operators.
CSA Scores
Compliance, Safety, Accountability scores used by FMCSA to monitor trucking company safety performance.
D
DQ File (Driver Qualification File)
A required file containing driver records such as MVRs, medical certificates, applications, and annual reviews.
DOT Number
A USDOT identification number assigned by FMCSA for safety monitoring and regulatory tracking.
DOT Audit
A federal compliance audit reviewing safety records, driver files, maintenance records, and operational compliance.
DOT Compliance
Following FMCSA and DOT regulations related to safety, driver qualifications, maintenance, and operational recordkeeping.
DOT Physical
A medical examination required for CDL drivers to determine physical qualification for operating commercial vehicles.
Drug & Alcohol Program
A federally required testing program for CDL drivers involving pre-employment, random, post-accident, and reasonable suspicion testing.
E
ELD (Electronic Logging Device)
An electronic system used to record Hours-of-Service driving time and duty status.
EIN (Employer Identification Number)
A federal tax identification number issued by the IRS for businesses.
F
FMCSA
Federal Motor Carrier Safety Administration — the federal agency regulating interstate trucking operations.
H
Hazmat
Hazardous materials requiring special transportation permits, placards, and safety procedures.
Hours-of-Service (HOS)
Federal regulations limiting commercial driver working and driving hours.
I
IFTA (International Fuel Tax Agreement)
A multi-state fuel tax reporting agreement simplifying fuel tax reporting for interstate carriers.
Interstate Commerce
Transportation of freight or passengers across state lines.
Intrastate Commerce
Transportation occurring entirely within one state.
IRP (International Registration Plan)
An agreement allowing interstate commercial vehicles to operate across multiple jurisdictions with apportioned registration.
L
Lease Agreement
A contract allowing a motor carrier or owner-operator to use equipment under specific terms.
Limited Query
An FMCSA Clearinghouse check confirming whether a driver has drug or alcohol violations on record.
Logbook
A record of a driver’s Hours-of-Service and duty status.
M
MC Number
Motor Carrier operating authority issued by FMCSA allowing interstate for-hire transportation.
MCS-150
The Motor Carrier Identification Report used to update FMCSA carrier information.
Medical Certificate
A DOT-required document verifying a driver meets physical qualification standards.
Motor Carrier
A company or person transporting freight or passengers using commercial motor vehicles.
MVR (Motor Vehicle Record)
A driving history report used in Driver Qualification Files and annual driver reviews.
N
New Entrant Safety Audit
An FMCSA review conducted on new interstate carriers during their first 18 months of operation.
O
Operating Authority
FMCSA authorization allowing carriers to transport regulated freight for hire in interstate commerce.
Out-of-Service Order
An FMCSA enforcement action preventing a driver or carrier from operating due to safety violations.
Owner-Operator
An individual who owns and operates their own commercial trucking business or vehicle.
P
Preventive Maintenance
Routine inspection and repair procedures designed to maintain vehicle safety and compliance.
Process Agent
An individual or company designated to receive legal documents for interstate carriers.
R
Random Drug Testing
Federally required unannounced testing performed through DOT drug & alcohol consortium programs.
Reasonable Suspicion Testing
Drug or alcohol testing based on observed driver behavior indicating possible substance use.
Recordkeeping
Maintaining required FMCSA compliance records such as DQ files, maintenance records, and HOS logs.
S
Safety Audit
An FMCSA review evaluating whether a carrier has basic safety management systems in place.
Safety Rating
An FMCSA evaluation of a carrier’s safety performance classified as:
Satisfactory
Conditional
Unsatisfactory
Sleeper Berth Provision
Hours-of-Service rules allowing drivers to split required off-duty time under certain conditions.
T
Telematics
Technology systems tracking vehicle location, driver behavior, and operational data.
Trip Sheets
Records documenting routes, mileage, stops, and operational activity for trucking companies.
U
UCR (Unified Carrier Registration)
An annual federal registration program required for many interstate trucking companies.
Unsafe DOT Rating
An FMCSA safety rating indicating serious safety deficiencies and possible operational shutdown risk.
USDOT Number
A unique identification number assigned to carriers for safety tracking and compliance monitoring.
V
Vehicle Maintenance File
A file containing required inspection, repair, and maintenance records for commercial vehicles.
W
Warning Letter
An FMCSA notice indicating safety or compliance concerns based on inspections, crashes, or violations.