Annex OrbisFMCSA · SAFETY STATISTICS
What puts trucks and drivers out of service?
The most frequent out-of-service violations in our indexed FMCSA inspection records, ranked by violation code.
Recorded violations13,594,393
Out-of-service violations2,416,602
Violation codes2,379
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 |
|---|---|---|---|---|
| 393.11A1-LPL | Lighting - Parking lamp(s) missing | 0 | 882 | 0.0% |
| 393.11B-CSRIGRR | Conspicuity Systems - Trailers, rear impact guard retro reflective sheeting inadequate on vehicle manufactured on or after December 1, 1993 | 0 | 8,705 | 0.0% |
| 393.11B-CSSRR | Conspicuity Systems - Trailers, side retro reflective sheeting inadequate on vehicle manufactured on or after December 1, 1993 | 0 | 5,213 | 0.0% |
| 393.11B-CSURR | Conspicuity Systems - Trailers, upper rear retro reflective sheeting inadequate on vehicle manufactured on or after December 1, 1993 | 0 | 8,164 | 0.0% |
| 393.11C-LSLA | Lighting - Stop lamp(s) amber | 0 | 291 | 0.0% |
| 393.11LR | No Lower rear retroreflective sheeting or reflex reflective materials as required for vehicles manufactured after December 1993 | 0 | 12,573 | 0.0% |
| 393.11TT | Truck-Tractor with No retroreflective sheeting or reflex reflective material on vehicle manufactured after July 1997 | 0 | 4,393 | 0.0% |
| 393.11UR | Upper Rear retroreflective sheeting or reflex reflecting material requirements for vehicles manufactured after December 1993 | 0 | 9,223 | 0.0% |
| 393.13A | Retroreflective tape not affixed as required for Trailers manufactured prior to December 1993 | 0 | 401 | 0.0% |
| 393.13C1 | No Side retroreflective sheeting or reflex reflective material as required for vehicles manufactured before December 1993 | 0 | 2,651 | 0.0% |
| 393.13C1-CSSRR | Conspicuity Systems - Trailers, side retro reflective sheeting inadequate on vehicle manufactured before December 1, 1993 | 0 | 927 | 0.0% |
| 393.13C2 | No Lower Rear retroreflective sheeting or reflex reflective material as required for vehicles manufactured before December 1993 | 0 | 2,065 | 0.0% |
| 393.13C2-CSLRR | Conspicuity Systems - Trailers, lower rear retro reflective sheeting inadequate on vehicle manufactured before December 1, 1993 | 0 | 1,375 | 0.0% |
| 393.13C3 | No Upper Rear retroreflective sheeting or reflex reflective material as required for vehicles manufactured before December 1993 | 0 | 1,704 | 0.0% |
| 393.13C3-CSURR | Conspicuity Systems - Trailers, upper rear retro reflective sheeting inadequate on vehicle manufactured before December 1, 1993 | 0 | 943 | 0.0% |
| 393.13D1 | Improper Side Placement of retroreflective sheeting or reflex reflective material as required for vehicles manufactured before December 1993 | 0 | 240 | 0.0% |
| 393.13D1-CSSRR | Conspicuity Systems - Trailers, side reflex reflectors inadequate on vehicle manufactured before December 1, 1993 | 0 | 284 | 0.0% |
| 393.13D2 | Improper Lower Rear Placement of retroreflective sheeting or reflex reflective material requirements for vehicles manufactured before December 1993 | 0 | 642 | 0.0% |
| 393.13D2-CSLRR | Conspicuity Systems - Trailers, lower rear reflex reflectors inadequate on vehicle manufactured before December 1, 1993 | 0 | 435 | 0.0% |
| 393.13D3 | Upper rear retroreflective sheeting or reflex reflective material as required for vehicles manufactured before December 1993 | 0 | 500 | 0.0% |
| 393.13D3-CSURR | Conspicuity Systems - Trailers, upper rear reflex reflectors inadequate on vehicle manufactured before December 1, 1993 | 0 | 274 | 0.0% |
| 393.17A1-LDCL | Lighting - Driveaway, clearance lamp(s) missing on front of towing vehicle | 0 | 57 | 0.0% |
| 393.17A2-LDSML | Lighting - Driveaway, side marker lamp(s) missing on front of towing vehicle | 0 | 36 | 0.0% |
| 393.17B1-LDSML | Lighting - Driveaway, side marker lamp(s) missing on rearmost towed vehicle | 0 | 353 | 0.0% |
| 393.17B2-LDIL | Lighting - Driveaway, identification lamp(s) missing on rear of the rearmost towed vehicle | 0 | 258 | 0.0% |
| 393.17B2-LDRR | Lighting - Driveaway, reflex reflector(s) missing on rear of rearmost towed vehicle | 0 | 77 | 0.0% |
| 393.17D-LDSML | Lighting - Driveaway, side marker lamp(s) missing on intermediate towed vehicle | 0 | 235 | 0.0% |
| 393.1B1-ID | Inspection - Failing to be knowledgeable and/or comply with the requirements of part 393 | 0 | 26 | 0.0% |
| 393.1C-IMC | Inspection - Allows/permits operation of vehicle not equipped in accordance with this part. | 0 | 10 | 0.0% |
| 393.201 | ALL FRAME VIOLATIONS | 0 | 1 | 0.0% |
| 393.209A-STSWSCM | Steering - Steering wheel spokes cracked through or missing | 0 | 26 | 0.0% |
| 393.24A-L | Lighting-Headlamps not steady burning as required. | 0 | 390 | 0.0% |
| 393.24B | Non-compliance with headlamp requirements | 0 | 786 | 0.0% |
| 393.24B/R | Non-compliant fog or driving lamps | 0 | 141 | 0.0% |
| 393.24C-L | Lighting - Headlamp(s) improperly mounted | 0 | 1,809 | 0.0% |
| 393.24D-L | Lighting - Headlamp(s) improperly aimed | 0 | 482 | 0.0% |
| 393.3-SV | External sun visor obstructs the drivers view | 0 | 460 | 0.0% |
| 393.44 | No or defective bus front brake line protection | 0 | 1 | 0.0% |
| 393.44-B | Air Brake - Air, no/defective bus front brake line protection | 0 | 5 | 0.0% |
| 393.47 | Inadequate brake lining for safe stopping | 0 | 3 | 0.0% |
| 393.47C-BSAMAD | Air Disc Brake - Slack adjuster length mismatched on the same axle other than a steering axle | 0 | 302 | 0.0% |
| 393.47F | Wedge type brake(s) out-of-adjustment | 0 | 432 | 0.0% |
| 393.50D-B | Air Brake - Missing or defective drain valve | 0 | 279 | 0.0% |
| 393.51D-B | Brake - Vacuum warning device missing/inoperative | 0 | 8 | 0.0% |
| 393.53A | No Automatic Brake Adjuster for Hydraulic Brake Systems for vehicle manufactured on or after 10/20/1993 | 0 | 62 | 0.0% |
| 393.53B | CMV manufactured after 10/19/94 has an automatic airbrake adjustment system that fails to compensate for wear | 0 | 94,700 | 0.0% |
| 393.53C | No or Defective Brake Adjustment Indicator on Air Brake System for vehicle manufactured after 10/19/1994 | 0 | 178 | 0.0% |
| 393.55A | ABS required on all CMVs with hydraulic brakes manufactured after February 1999 | 0 | 722 | 0.0% |
| 393.55B | ABS malfunction indicators for hydr brake sys | 0 | 1,547 | 0.0% |
| 393.55B-B | Hydraulic Brake - ABS malfunction lamp defective on truck/bus manufactured on or after March 1, 1999 | 0 | 4,295 | 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 ↗