Sources
CDL List content is based on official government sources: federal regulations, agency guidance, and official state agency websites. This page lists the primary sources used across the site. All links go to official government or authoritative reference domains.
Source URLs are reviewed periodically. If you find a broken link, please use our corrections page.
FMCSA — Federal Motor Carrier Safety Administration
- Commercial Driver's License (CDL) — FMCSA
Primary FMCSA CDL information hub.
- Physical Qualifications and Medical Examinations — FMCSA
- National Registry of Certified Medical Examiners — FMCSA
Use to locate a certified medical examiner.
- New Entrant Safety Assurance Program — FMCSA
- Driver Qualification Files — FMCSA Regulations Overview
- Drug & Alcohol Clearinghouse — FMCSA
Official Clearinghouse portal for employers and drivers.
- Clearinghouse — Employer Resources — FMCSA
- Training Provider Registry (TPR) — FMCSA
- Entry-Level Driver Training (ELDT) — FMCSA
- Hazardous Materials — CDL HazMat Endorsement — FMCSA
- Drug and Alcohol Testing — FMCSA
FMCSA overview of drug and alcohol testing rules for CMV drivers.
- Registration — FMCSA
- Electronic Logging Devices (ELDs) — FMCSA
- Hours of Service — FMCSA
- Pre-Employment Screening Program (PSP) — FMCSA
FMCSA's Pre-Employment Screening Program provides carriers access to 5 years of driver crash data and 3 years of inspection/violation data.
- Safety Measurement System (SMS) — FMCSA
FMCSA's Safety Measurement System (SMS) calculates Compliance, Safety, Accountability (CSA) BASIC scores for motor carriers.
- Compliance, Safety, Accountability (CSA) — FMCSA
FMCSA CSA program overview: BASIC categories, safety ratings, and carrier compliance.
eCFR — Electronic Code of Federal Regulations
Federal regulations are cited from the eCFR, maintained by the U.S. Government Publishing Office. Regulations are updated continuously — always verify the current version at ecfr.gov.
- 49 CFR Part 172 — Hazardous Materials Communication Standards
Governs hazmat communication requirements: shipping papers, marks, labels, placards, and security plans.
- 49 CFR Part 177 — Carriage by Public Highway
Governs carriage of hazardous materials by public highway: loading, unloading, segregation, and routing requirements.
- 49 CFR Part 383 — Commercial Driver's License Standards
Primary regulatory authority for CDL standards.
- 49 CFR Part 391 — Qualifications of Drivers
Governs driver qualification requirements including DQ file contents.
- 49 CFR Part 382 — Controlled Substances and Alcohol Testing
Governs DOT drug and alcohol testing requirements.
- 49 CFR Part 40 — DOT Workplace Drug and Alcohol Testing Procedures
DOT-wide procedural rules for drug and alcohol testing; applies to all DOT-regulated modes.
- 49 CFR Part 380 — Special Training Requirements (ELDT)
- 49 CFR Part 395 — Hours of Service of Drivers
- 49 CFR Part 393 — Parts and Accessories Necessary for Safe Operation
- 49 CFR Part 396 — Inspection, Repair, and Maintenance
- 49 CFR Part 390 — Federal Motor Carrier Safety Regulations — General
Other federal agencies
- Hazardous Materials Regulations — PHMSA
PHMSA is the federal agency responsible for the Hazardous Materials Regulations (49 CFR Parts 171-180).
- Annual Random Drug and Alcohol Testing Rates — DOT ODAPC
DOT publishes current and historical random testing minimum rates by agency (FMCSA, FAA, FRA, etc.).
- Independent Contractor or Employee? — IRS
IRS guidance on the employee vs. independent contractor distinction.
- Form SS-8 — Determination of Worker Status — IRS
- Worker Classification — FLSA / Independent Contractors — DOL
- Independent Contractor Classification Rulemaking — DOL WHD
DOL page listing FLSA independent contractor rulemaking actions, including the January 2024 final rule and the February 26, 2026 proposed rulemaking.
- HazMat / TWIC Background Check — TSA
- IFTA, Inc. — International Fuel Tax Agreement
IFTA, Inc. is the official administrator of the International Fuel Tax Agreement compact among US states and Canadian provinces.
State CDL agency sources
State CDL agency links are used on the state resource pages. All links point to official state government domains. State pages and URL paths change — if a link is broken, use the corrections page or search for the state's driver licensing agency directly.
- Commercial Driver Licenses — California DMV
- Commercial Driver License — Texas DPS
- Commercial Driver License — Florida FLHSMV
- Florida CDL Driver Manual — Florida Highway Safety and Motor Vehicles (FLHSMV)
- Commercial Driver License — New York DMV
- Commercial Driver License — Alabama Law Enforcement Agency (ALEA)
- Commercial Driver License — Alaska Division of Motor Vehicles
- Commercial Driver License — Arizona DOT Motor Vehicle Division
- Commercial Driver License — Arkansas DFA Driver Control
- Commercial Driver License — Colorado Division of Motor Vehicles
- Commercial Driver License — Connecticut DMV
- Commercial Driver License — Delaware Division of Motor Vehicles
- Commercial Driver License — DC Department of Motor Vehicles
- Commercial Driver License — Georgia Department of Driver Services
- Commercial Driver License — Hawaii Department of Transportation
- Commercial Driver License — Idaho Transportation Department
- Commercial Driver License — Illinois Secretary of State
- Commercial Driver License — Indiana Bureau of Motor Vehicles
- Commercial Driver License — Iowa Department of Transportation
- Commercial Driver License — Kansas Department of Revenue
- Commercial Driver License — Kentucky Transportation Cabinet
- Commercial Driver License — Maine Bureau of Motor Vehicles
- Commercial Driver License — Maryland Motor Vehicle Administration
- Commercial Driver License — Massachusetts Registry of Motor Vehicles
- Commercial Driver License — Michigan Secretary of State
- Commercial Driver License — Minnesota Driver and Vehicle Services
- Commercial License — Mississippi DPS Driver Service Bureau
- Commercial Driver License — Missouri Department of Revenue
- Commercial Driver License — Montana Department of Justice
- Commercial Driver License — Nebraska DMV
- Commercial Driver License — Nevada DMV
- Commercial Driver License — New Hampshire Division of Motor Vehicles
- Commercial Driver License — New Jersey Motor Vehicle Commission
- Commercial Driver License — New Mexico Motor Vehicle Division
- Commercial Driver License — North Carolina Division of Motor Vehicles
- Commercial Driver License — North Dakota Department of Transportation
- Commercial Driver License — Ohio Bureau of Motor Vehicles
- Commercial Driver License — Oklahoma Department of Public Safety
- Getting a Commercial Driver License or Commercial Learner Permit — Oregon DMV
- Oregon CDL Driver Manual — Oregon Department of Transportation — DMV
- Commercial Driver License — Pennsylvania DOT
- Commercial Driver License — Rhode Island Division of Motor Vehicles
- Commercial Driver License — South Dakota Department of Revenue
- Commercial Driver License — Tennessee Department of Safety
- Commercial Driver License — Utah Driver License Division
- Commercial Driver License — Vermont Department of Motor Vehicles
- Commercial Driver License — Virginia Department of Motor Vehicles
- Commercial Driver License — Washington State Department of Licensing
- Commercial Driver License — West Virginia Division of Motor Vehicles
- Commercial Driver License Requirements — Wisconsin DMV
- Commercial Driver License — Wyoming Department of Transportation