CDL (Commercial Driver's License)
A special driver's license required to operate commercial motor vehicles (CMVs) including large trucks, buses, and vehicles carrying hazardous materials.
Key Facts
- Three classes: A (combination), B (single heavy), C (passengers/HazMat)
- Required for vehicles over 26,001 lbs GCWR
- Drivers must maintain valid DOT medical certificate
- Subject to FMCSA drug and alcohol testing requirements
A CDL is required for vehicles with a gross combination weight rating (GCWR) over 26,001 lbs, vehicles designed to transport 16+ passengers, or vehicles transporting hazardous materials requiring placards. Three classes: Class A (combination vehicles over 26,001 lbs), Class B (single vehicles over 26,001 lbs), Class C (vehicles carrying 16+ passengers or HazMat). CDL holders must maintain a valid DOT medical certificate and are subject to FMCSA drug and alcohol testing requirements. States issue CDLs but follow federal minimum standards.
CMV Driver Credentials Compared
Licenses, certificates, and registrations required for commercial motor vehicle operators.
| Type | Issued By | Purpose | Validity Period | Required For |
|---|---|---|---|---|
| CDL | State DMV | License to operate CMVs | Per state renewal cycle | Vehicles > 26,001 lbs / 16+ passengers |
| MEC (DOT Card) | NRCME examiner | Proof of medical fitness | 1–2 years | All CDL holders |
| NRCME Listing | FMCSA | Certifies medical examiners | 10 years | Examiners performing DOT physicals |
| HOS Compliance | FMCSA / ELD | Tracks driving/on-duty time | Continuous | Most CMV drivers |
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