Out of Service (OOS)
A formal legal order by enforcement officials prohibiting a driver or vehicle from operating until critical safety violations are corrected.
TL;DR
Legal shutdown order for drivers/vehicles with safety violations that pose imminent hazard until defects are fixed.
Key Points
- ✓OOS orders immediately prohibit CMV operation until critical safety violations are corrected
- ✓2024 OOSC updates include brake system refinements and coupling device clarifications
- ✓Penalties for violating OOS orders range from $3,740 to over $232,762 per violation
- ✓OOS violations heavily impact CSA scores and can trigger company-wide operating restrictions
What is Out of Service (OOS)?
Out of Service (OOS) is a formal legal order issued by authorized enforcement officials that requires a commercial motor vehicle driver and/or vehicle to immediately stop operating because specific violations create an imminent hazard to safety. Operations cannot resume until those violations are corrected and the driver is legally qualified to drive again.
Legal Framework and Authority
The North American Standard Out-of-Service Criteria (OOSC) serve as the pass-fail rules used by certified commercial vehicle safety officers in the U.S., Canada, and Mexico. These criteria are updated annually by the Commercial Vehicle Safety Alliance (CVSA), with the 2024 OOSC taking effect April 1, 2024.
OOS orders are issued under federal regulations including 49 CFR §§ 386.72, 390.5, 392.5, 395.13, and 396.9. Under 49 CFR § 395.13, a driver ordered out of service cannot operate a CMV until legally allowed to do so under hours-of-service and related FMCSA rules.
Common OOS Violations
Driver-Related Violations
- Hours-of-Service Violations: Excessive driving/on-duty time with no legal off-duty period remaining
- License Issues: No valid CDL or required endorsements like hazmat endorsement
- Medical Disqualification: Expired medical card or disqualifying medical condition
- Substance Violations: Drug or alcohol use violating 49 CFR 392.5
- Electronic Logging Device Issues: Missing or falsified logs preventing compliance determination with ELD requirements
Vehicle-Related Violations
- Brake Defects: 20% or more defective brakes, broken components, air leaks, inoperative service brakes
- Steering Problems: Components so worn or damaged they affect vehicle control
- Tire/Wheel Issues: Exposed cord, flat tires in critical positions, severe tread damage
- Coupling Device Failures: Broken safety components, unsecured latches, mismatched ball hitches
- Suspension/Frame Damage: Cracked frame rails, broken spring assemblies
- Fuel System Leaks: Leaks creating fire or environmental hazards
2024 OOSC Updates
The 2024 Out-of-Service Criteria introduced several important changes:
- Hazmat Endorsement Clarification: Added notes regarding expired TSA screening/HM determination status
- Brake System Refinements: Explicitly included missing camshaft bushings in the 20% brake defect criterion
- Coupling Device Updates: New explicit coverage for latches not secured and mismatched ball hitches
- Lighting Clarification: Required lights not turned on when required is not itself an OOS condition if lights are operational
Financial Penalties
Operating in violation of an OOS order carries severe financial consequences. FMCSA's 2024 civil penalty adjustments specify fines ranging from $3,740 to over $96,000 depending on violation type. For violations causing death, serious illness, or severe injury, penalties can reach $232,762 per violation. Operating a CMV in violation of an OOS order can result in fines up to $29,980 per day.
Impact on Carriers and Drivers
Immediate Operational Impact
When placed OOS, drivers must stop operating immediately, usually at the inspection site or next safe location. The vehicle cannot be moved beyond limited allowances to reach a repair facility if specifically permitted by the enforcement officer.
CSA and Safety Rating Effects
OOS violations significantly impact CSA scores and safety ratings. These violations are weighted heavily in FMCSA's Safety Measurement System, potentially triggering more frequent inspections and compliance reviews. High OOS rates can lead to conditional or unsatisfactory safety ratings.
Company-Wide OOS Orders
Under 49 CFR 386.72, FMCSA can place entire carriers out of service nationwide for egregious safety failures. These orders stop all CMV operations until the carrier demonstrates adequate corrective action and FMCSA rescinds the order.
Prevention and Compliance
Preventing OOS violations requires comprehensive safety management:
- Regular Inspections: Conduct thorough pre-trip inspections and post-trip inspections
- Maintenance Programs: Implement preventive maintenance schedules addressing brake systems, coupling devices, and other critical components
- Driver Qualification Management: Monitor CDL status, medical certifications, and endorsement expiration dates
- Hours-of-Service Compliance: Ensure proper ELD usage and HOS compliance monitoring
- Training Programs: Regular safety training on CVSA inspection procedures and OOS criteria
Reinstatement Process
Before returning to service, all OOS violations must be corrected and documented. For vehicle defects, repairs must be completed and verified. For driver violations, the underlying cause must be resolved - whether accumulating sufficient rest time for HOS violations, renewing medical certifications, or completing substance abuse return-to-duty processes. Carriers may need to provide proof of corrections during follow-up audits or inspections at weigh stations.