DOT Out of Service Violations List: The Most Common CMV Violations You Must Know

Understanding a DOT out of service violations list is critical for any commercial driver, owner-operator, or motor carrier. These violations are not minor—they are serious safety issues that can shut your truck down immediately, cost thousands in fines, and increase your insurance premiums.

In this guide, we’ll break down the most common out-of-service (OOS) violations, what causes them, and how to avoid them.

What Is a DOT Out of Service Violation?

A DOT out-of-service violation occurs when a commercial motor vehicle (CMV), driver, or cargo is found to be unsafe under regulations enforced by the Federal Motor Carrier Safety Administration.

When an officer places you out of service:

• You cannot continue driving
• The issue must be corrected immediately
• A violation is recorded on your safety record

These standards are guided by the Commercial Vehicle Safety Alliance, which defines what qualifies as an OOS condition.

Complete DOT Out of Service Violations List

Out-of-service violations fall into three main categories:

• Driver violations
• Vehicle violations
• Cargo violations

Driver Out of Service Violations

Driver-related violations are among the fastest ways to be placed out of service.

1. Hours of Service (HOS) Violations

• Exceeding maximum driving hours
• Failing to take required rest breaks
• False or incomplete logbooks

👉 This is one of the most common OOS violations.

2. No Valid CDL

• Expired CDL
• Wrong class of license
• Suspended or revoked license

3. No Medical Certificate

• Missing or expired medical card
• Not medically qualified to drive

4. Drug and Alcohol Violations

• Positive drug or alcohol test
• Refusal to submit to testing

5. Operating Without Required Endorsements

• Hazmat without endorsement
• Tanker without proper certification

Vehicle Out of Service Violations

Vehicle violations are heavily enforced and often fall under FMCSA equipment rules.

6. Brake System Violations

• Out-of-adjustment brakes
• Air leaks
• Broken or missing components

👉 Brake violations are the #1 cause of vehicle OOS orders.

7. Tire Violations

• Tread depth below legal limits
• Exposed cords or belts
• Sidewall damage

8. Lighting Violations

• Inoperative headlights
• Broken brake lights
• Missing clearance lights

9. Steering System Defects

• Excessive steering wheel play
• Loose or worn components

10. Suspension Violations

• Broken leaf springs
• Missing U-bolts
• Air suspension leaks

11. Frame or Structural Damage

• Cracked frame
• Loose or damaged cross members

12. Fuel System Leaks

• Leaking fuel lines or tanks

👉 Immediate OOS due to fire risk.

13. Coupling Device Failures

• Improper fifth wheel connection
• Missing safety chains

14. Exhaust System Issues

• Leaks that could expose cargo or driver to fumes

15. Windshield and Visibility Issues

• Obstructed view
• Severe cracks

Cargo Securement Out of Service Violations

Improper cargo securement is a major safety hazard.

16. Improper Tie-Downs

• Insufficient number of straps
• Damaged or weak tie-downs

17. Shifting or Falling Cargo

• Load not properly balanced
• Risk of cargo falling onto roadway

18. Overweight Loads

• Exceeding legal weight limits

19. Unsecured Hazardous Materials

• Missing placards
• Improper packaging

Most Common DOT Out of Service Violations

While there are many violations, these are the most frequently cited:

• Brake system violations
• Tire defects
• Hours of Service violations
• Lighting issues
• Cargo securement problems

These violations account for a large percentage of roadside inspection failures.

What Happens After an OOS Violation?

Once placed out of service:

• You must fix the issue immediately
• The violation is recorded in your CSA score
• You may face fines and penalties

Operating while under an OOS order can lead to:

• Heavy fines
• CDL suspension
• Increased insurance costs

How Long Do OOS Violations Stay on Your Record?

Out-of-service violations typically remain on record for:

• 24 months

Their impact is strongest during the first year, especially when insurance companies review your safety history.

How to Avoid DOT Out of Service Violations

Prevention is the best strategy.

Perform Daily Inspections

Check:

• Brakes
• Tires
• Lights
• Coupling devices

Follow FMCSA Regulations

Stay compliant with rules from the Federal Motor Carrier Safety Administration covering:

• Hours of Service
• Vehicle maintenance
• Driver qualifications

Maintain Your Equipment

Regular maintenance reduces breakdowns and violations.

Train Drivers

Ensure drivers:

• Understand inspection requirements
• Know how to identify issues
• Report problems immediately

Why This DOT Out of Service Violations List Matters

Knowing the DOT out of service violations list helps you:

• Avoid costly fines
• Prevent downtime
• Improve CSA scores
• Lower insurance premiums

For trucking businesses, compliance isn’t just about following rules—it’s about staying profitable and operational.

Key Takeaways

• DOT out-of-service violations are serious safety issues
• They can shut down your operation immediately
• The most common violations involve brakes, tires, and HOS
• Violations stay on your record for up to 24 months
• Prevention through inspections and maintenance is critical

Final Thoughts

A complete understanding of the DOT out of service violations list is essential for anyone in the trucking industry. These violations can impact your safety record, your insurance costs, and your ability to operate. By staying proactive, maintaining your equipment, and following regulations, you can avoid OOS violations and keep your business running smoothly.

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