Navigating Texas Commercial Carrier Regulations
If you operate a commercial motor vehicle (CMV) in Texas, compliance with both state and federal regulations is non-negotiable. Violations can result in fines, out-of-service orders, and damage to your carrier safety rating. This guide covers the essential regulations that Texas carriers and logistics businesses need to understand.
Who Regulates Carriers in Texas?
Texas commercial carriers operate under a dual regulatory structure:
- Federal Motor Carrier Safety Administration (FMCSA): Sets federal safety standards for interstate commerce (crossing state lines).
- Texas Department of Transportation (TxDOT): Oversees intrastate operations (moving entirely within Texas) through the Motor Carrier Division.
If you cross state lines at any point, federal FMCSA rules apply in full, regardless of where most of your business takes place.
Key Registration Requirements
USDOT Number
Any carrier operating in interstate commerce or meeting certain intrastate thresholds must have a USDOT number issued by the FMCSA. This number identifies your company in safety data systems.
Texas Intrastate Operating Authority
Carriers operating only within Texas must register with TxDOT's Motor Carrier Division. Requirements vary based on vehicle type and cargo. Common registrations include:
- Texas Motor Carrier Registration (for CMVs over 26,000 lbs GVWR operating intrastate)
- Unified Carrier Registration (UCR) for interstate carriers
Hours of Service (HOS) Rules
Federal HOS rules apply to interstate CDL drivers. Key limits include:
- 11-hour driving limit after 10 consecutive hours off duty
- 14-hour on-duty window — no driving after 14 consecutive hours on duty
- 30-minute break required after 8 hours of driving
- 60/70-hour limit over 7 or 8 consecutive days
Electronic Logging Devices (ELDs) are mandatory for most CMV operators to track HOS electronically.
Vehicle Weight and Size Limits in Texas
| Vehicle Type | Max Gross Weight | Max Width | Max Length (Single) |
|---|---|---|---|
| Standard CMV | 80,000 lbs | 8.5 ft | 45 ft |
| Combination Vehicle | 80,000 lbs | 8.5 ft | 65 ft |
| Oversize (with permit) | Varies by permit | Up to 14 ft | Up to 125 ft |
Note: Texas allows oversize/overweight permits through TxDOT for loads exceeding standard limits. Oversized loads often require escort vehicles and nighttime travel restrictions.
Hazardous Materials (Hazmat) Compliance
Carriers transporting hazmat goods must comply with both FMCSA and PHMSA (Pipeline and Hazardous Materials Safety Administration) regulations, including:
- Proper hazmat placarding on vehicles
- Hazmat endorsement on CDL for drivers
- Shipping papers and emergency response information
- Route restrictions for certain materials (e.g., explosive, radioactive)
Drug and Alcohol Testing
All CDL holders operating CMVs in interstate commerce must participate in a DOT-compliant drug and alcohol testing program, including pre-employment, random, post-accident, and reasonable suspicion testing.
Staying Compliant: Practical Tips
- Keep all vehicle registration, insurance certificates, and permits current and accessible in each vehicle.
- Conduct and document pre-trip and post-trip vehicle inspections.
- Maintain driver qualification files for every CDL employee.
- Audit your ELD data regularly to catch HOS violations before an inspection does.
- Subscribe to TxDOT and FMCSA update notifications to catch regulatory changes early.
Compliance isn't just about avoiding fines — it's foundational to operating a sustainable, reputable carrier business in Texas. When in doubt, consult a transportation attorney or a compliance specialist familiar with both TxDOT and FMCSA requirements.