FMCSR 172.516C6: Placard Damaged or Obscured — Q&A

No. Across our inspection records, 172.516C6 citations result in out-of-service placement only 1.3% of the time (11 out of 853 all-time citations). This is dramatically below the national FMCSR average OOS rate of 31.4%. In Texas alone—where the vast majority of these citations occur (214 in the last 180 days)—the OOS rate is 0.0%. While a damaged or deteriorated placard is a compliance issue that inspectors will cite, it is unlikely to ground your truck at the roadside.

172.516C6 is one of the mildest hazmat violations on record. Our data shows the similar code 177.817(e) (placard deteriorated/damaged) carries a 5.2% OOS rate—still low, but 4× higher than 172.516C6's 1.6%. In stark contrast, general loading/unloading violations under 177.834(a) hit a 97.9% OOS rate, and placarding violations under 177.817(a) reach 75.1%. A damaged placard citation indicates a documentation or condition issue, not an operational hazard large enough to warrant immediate shutdown in most cases.

First, inspect your placards for damage, deterioration, or obstruction—ensure they are clean, legible, and fully visible on all sides of your vehicle. Second, check your vehicle's condition: our inspection records show 172.516C6 often appears with lighting (393.9) and windshield defects (393.78) in the same inspection. If an inspector saw one issue, they may spot others. Third, document your compliance: photograph the placards before your next load and keep records. Fourth, review your hazmat paperwork and emergency response information. A citation is not an automatic carrier mark; focus on correcting the underlying condition.

Texas dominates enforcement of this code. In the last 180 days, Texas accounted for 214 citations—more than 20× the second-place state. Illinois follows with 9 citations (22.2% OOS rate), and Iowa with 5 citations (20.0% OOS rate). If you haul hazmat through Texas, the likelihood of encountering this citation is substantially higher than in other states. This likely reflects Texas's large hazmat transportation volume and roadside inspection frequency.

Citations have held relatively steady. Over the last 12 months, we recorded 440 citations (37 per month on average). January 2026 saw a spike to 58 citations, while April 2025 was the low point at 13 citations. The trend shows fluctuation rather than a clear upward or downward trajectory. This suggests consistent enforcement effort without a major shift in compliance or inspection intensity. The code ranks #754 of 3,036 FMCSR codes by all-time citation volume, placing it in the lower-medium enforcement range.

Yes, you can contest any roadside citation through the DataQS (Correcting and Improving Safety Data) system. However, your success depends on the facts. If an inspector documented a damaged, deteriorated, or obscured placard, and the photographic or written evidence clearly shows the issue, your dispute will face an uphill climb. DataQS works best when documentation contains a clear error—wrong vehicle, code misapplication, or factual inaccuracy. If you believe the placard was compliant at the time of inspection, gather evidence (photos, maintenance records) and submit it through your carrier's DataQS portal.

Kenworth trucks (KW) account for 205 citations, followed by Freightliner (FRHT) at 198, and Peterbilt (PTRB) at 147. These totals reflect market share as much as enforcement pattern—Kenworth and Freightliner are the most common Class 8 trucks in hazmat service. Specialized tanker vehicles like Heil (66 citations) and Polar (43 citations) also appear frequently, consistent with their use in liquid hazmat transport. Vehicle make is not a risk factor; the condition of your placards is.

When inspectors cite 172.516C6, they frequently find related equipment defects. In the last 90 days, inoperable required lamps (393.9) appeared 16 times alongside 172.516C6. Windshield condition issues (393.78) co-occurred 11 times. Placard-related codes are also common: 177.817(e) (placard deteriorated/damaged) appeared 7 times, and 172.328D (missing emergency shutoff marking) appeared 7 times. The pattern suggests that when a vehicle's placard maintenance is poor, other compliance gaps are likely nearby. A 172.516C6 citation should prompt a full vehicle safety inspection before your next load.