What 172.514B means in plain language
When you transport a bulk package—a large container, tank, or similar vessel—that previously held hazardous materials, the residue left inside can still pose a risk. Federal regulations require that such packages display proper hazmat placards on all four sides, even if the contents are no longer present or the material has dried.
A 172.514B citation means an inspector found a bulk package with hazmat residue that was not properly placarded during a roadside inspection. "Properly placarded" means the correct placard was visible, legible, and displayed in the required locations. Residue counts—dust, liquid film, or dried material clinging to the interior or exterior—still obligates you to placard the package as if it contained the original hazardous material.
This is fundamentally different from an empty container. The regulation treats residue-bearing packages as active hazmat shipments for labeling and communication purposes, because first responders and other drivers need to know what hazard they're dealing with in case of accident or emergency.
What our enforcement data actually shows
Across 13 million inspections in our database, 172.514B citations are uncommon. Our inspection records show 22 all-time citations for this code, with 11 citations in the last 12 months and 2 in the last 90 days. This ranks 172.514B at #1898 of 3,036 FMCSR codes by citation volume.
The out-of-service rate for 172.514B is 40.9%—meaning roughly four in ten citations result in immediate removal from service. This is notably higher than the all-FMCSR average OOS rate of 31.4%, indicating that when inspectors cite this violation, they place trucks out of service at a significantly elevated rate. Of the 22 all-time citations, 9 resulted in an out-of-service order and 13 did not.
Month-to-month, enforcement has been light but consistent. The data in our database indicates a slight uptick in late 2025 and early 2026, with 2 citations in December 2025 and 2 in January 2026, compared to 1 citation in May 2025 and October 2025.
Who gets cited most
Our inspection records show that Texas dominates 172.514B citations in the last 180 days, with 6 citations and a 66.7% out-of-service rate. No other state appears in the top citation count for this code during that period, reflecting the regional concentration of bulk hazmat transport and inspection activity.
Among carriers, our data shows fleets such as Transportes Nari SA de CV (USDOT 3130107) with 2 all-time citations, the highest count in our dataset. The remaining carriers in the enforcement record each have 1 citation. This distribution suggests that 172.514B citations are scattered across many small and mid-sized operators rather than concentrated in any single fleet, which is consistent with the low overall citation volume.
How severe is this compared to similar codes
To understand where 172.514B sits in the hazmat violation landscape, consider a few peer codes in the same category:
Placarding violations generally are more heavily enforced. For example, 177.817(a)—a broad placarding violation—accounts for 2,274 citations with a 75.1% out-of-service rate, far exceeding 172.514B's enforcement volume and OOS rate. Similarly, 172.502(a)(1), which covers placarding general requirements, shows 1,820 citations with an 18.5% OOS rate.
General loading and unloading hazmat violations (177.834A-HMC and 177.834(a)) are more severe in enforcement outcome, with OOS rates of 99.2% and 97.9% respectively, though those codes address structural compliance rather than residue-specific placarding.
Movement of damaged hazmat packages (177.823(a)) is a closer peer, with 1,829 citations and a 51.8% OOS rate—slightly above 172.514B's 40.9%—because inspectors treat both as active contamination risks.
The data indicates that 172.514B, while infrequently cited, carries a higher-than-average severity when it is enforced, suggesting inspectors view residue placarding lapses as material safety concerns.
How to avoid it
Prevent a 172.514B citation by building residue awareness into your pre-trip and load handoff procedures:
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Inspect bulk packages for visible residue before loading. Look inside and around the exterior of tanks, drums, and containers. Any caked material, staining, or odor is residue. Do not assume "empty" means residue-free.
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Verify placarding is applied to all four sides of the bulk package before departure. Use a checklist during the pre-trip walk-around. Take a photo if available for your records.
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Confirm placard legibility and condition. Placards must be visible, not faded, peeling, or obscured by tarps, strapping, or loading equipment. Our inspection records show that co-occurring codes like 177.817A (other placarding violations) often appear in the same stop, indicating that placarding defects cluster.
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Document the hazmat commodity and residue class. Know what was in the container before it came to you, and what residue classification applies. Cross-reference the shipper's documentation so you can discuss it with an inspector if asked.
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Coordinate with shippers and receivers on residue protocols. If you regularly haul bulk containers, establish a written understanding with partners about who is responsible for cleaning, re-placarding, and certifying empty or residue-bearing packages.
Because our data shows that general placarding violations (177.817A) often co-occur with 172.514B inspections, make placarding discipline a cornerstone of your hazmat safety routine, not an afterthought.