Annex OrbisWhat puts trucks and drivers out of service?
The most frequent out-of-service violations in our indexed FMCSA inspection records, ranked by violation code.
All violation codes
Highest OOS count first. Codes with no recorded OOS occurrences appear last.
| Violation code | Description | OOS occurrences | All occurrences | Share of all OOS |
|---|---|---|---|---|
| 397.5C-HMDP | HM (Driving & Parking) - Motor vehicle containing HM other than Division 1.1, 1.2, or 1.3 left unattended on a public street/highway/shoulder | 0 | 10 | 0.0% |
| 397.67 | HM vehicle routing violation (non RAM) | 0 | 288 | 0.0% |
| 397.67B-HMDP | HM (Driving & Parking) - Operate an HM motor vehicle, required to be placarded or marked in violation of routing (Non RAM). | 0 | 44 | 0.0% |
| 397.67D-HMDPMC | HM (Driving & Parking) - Operating a motor vehicle without preparing a written route plan for Division 1.1, 1.2, or 1.3 | 0 | 3 | 0.0% |
| 397.7A | Improperly parked explosives vehicle | 0 | 1 | 0.0% |
| 397.7A3-HMDP | HM (Driving & Parking) - Within 300 feet of a bridge, tunnel, dwelling, or place where people work, congregate, or assemble, except for brief periods as necessary | 0 | 2 | 0.0% |
| 397.7B | Improperly parked hazmat vehicle | 0 | 30 | 0.0% |
| 397.7B-HMDP | HM (Driving & Parking) - Driver parked a motor vehicle containing HM other than Division 1.1, 1.2, or 1.3 on or within 5 feet of the travelled portion of a public | 0 | 30 | 0.0% |
| 398.3B8-MW | Migrant Workers - No doctors certificate of qualification in possession | 0 | 17 | 0.0% |
| 398.4 | Driving of vehicles - Transportation of Migrant Workers | 0 | 13 | 0.0% |
| 398.4-MW | Migrant Workers - Driving of vehicles transporting migrant workers in violation of this part | 0 | 18 | 0.0% |
| 398.5 | Failure to maintain vehicle for safe operation - Transportation of Migrant Workers | 0 | 3 | 0.0% |
| 398.5-MW | Migrant Workers - Failed to maintain vehicle for safe operation of this part | 0 | 30 | 0.0% |
| 398.6-MW | Migrant Workers - Violation of hours of service regulations for transportation of migrant workers | 0 | 1 | 0.0% |
| 398.7 | Inspection and Maintenance of motor vehicles used for Transportation of Migrant Workers | 0 | 6 | 0.0% |
| 398.8C2-MW | Migrant Workers - Operate under an out-of-service order | 0 | 15 | 0.0% |
| 398.8D1 | FAILURE TO CORRECT DEFECT(S) ON PREVIOUS INSPECTION 7/5/24 CT0558001010- WINDOW TINT | 0 | 2 | 0.0% |
| 398.8D2-MW | Migrant Workers - Failure to return inspection report within 15 days | 0 | 2 | 0.0% |
| 399.207 | Vehicle access requirements violations | 0 | 322 | 0.0% |
| 399.211 | Inadequate maintenance of driver access | 0 | 128 | 0.0% |
| 399.211-CBP | Cab-Over-Engine truck or tractor only - Defective cab access steps, handholds or deck plates | 0 | 1,392 | 0.0% |
| 78.325-HMP | HM (Packaging) - MC 304 general requirements. | 0 | 1 | 0.0% |
| 78.330-HMP | HM (Packaging) - MC 310 general requirements. | 0 | 1 | 0.0% |
| 78.331-8B | MC311 INTERNAL VALVE | 0 | 1 | 0.0% |
| 78.336-10-HMP | HM (Packaging) - MC 330 protection of fitting. | 0 | 2 | 0.0% |
| 78.336-13-HMP | HM (Packaging) - MC 330 anchoring of tank. | 0 | 3 | 0.0% |
| 78.336.17-HMP | HM (Packaging) - MC 330 ID plate requirements. | 0 | 4 | 0.0% |
| 78.336-9A | MC330 SAFETY RELIEF DEVICES | 0 | 1 | 0.0% |
| 78.336-9C-HMP | HM (Packaging) - MC 330 markings of inlets/outlets. | 0 | 6 | 0.0% |
How to read this report
Each indexed violation identity counts once. Only a violation explicitly marked out of service contributes to the OOS count. Repeated copies are counted once; conflicting code or OOS values are excluded. Unknown flags remain in all occurrences but not in the OOS count. Missing codes appear as “Code not reported”.
These are violation counts, not unique inspections, trucks, drivers, or carrier-wide out-of-service orders. Coverage describes the currently indexed inspection dataset, not all historical FMCSA records. Frequencies do not establish crash causation or a carrier’s safety rating.
Unknown OOS flags: 112 · Conflicting records excluded: 0
FMCSA source data ↗