What 172.334(b) means in plain language
FMCSR 172.334(b) addresses specific requirements related to hazardous materials transportation and documentation. The regulation establishes standards for how hazmat materials must be prepared, packaged, and accompanied by the proper shipping papers and information during transport.
If you received a citation for this code, an inspector determined that your vehicle, load, or accompanying documentation did not meet these packaging or documentation standards. This could involve the condition of containers, the accuracy of shipping papers, or the completeness of hazard class information provided to you before loading.
What our enforcement data actually shows
Across our database of 13 million+ roadside inspections, 172.334(b) has generated 8 all-time citations. In the past 12 months, we recorded 0 citations, and in the past 90 days, 0 citations. This code ranks #2269 of 3,036 FMCSR codes by citation volume.
None of the 8 all-time citations resulted in an out-of-service order, giving this code a 0.0% OOS rate. For context, the all-FMCSR average OOS rate is 31.4%, meaning 172.334(b) citations are significantly less likely to result in immediate removal from service compared to other violations.
The rarity of this citation suggests that either compliance with this requirement is widespread, or that inspectors encounter few loads where this specific violation is detected during roadside stops.
Who gets cited most
Our inspection records show that 172.334(b) citations are extremely sparse and distributed across multiple small carriers. No single state or carrier has accumulated a pattern of repeat violations for this code.
The carriers cited include 440411 ONTARIO LTD, MIDWEST PARTS & EQUIPMENT LLC, FUEL SOUTH EXPRESS LLC, FRONTIER TANK LINES INC, BUCCI EXPRESS INC, CTS NATIONAL CORPORATION, ONE LLC, and CRENA TRANSPORTATION SERVICES LLC—each with 1 citation in our all-time database.
Vehicles cited included Freightliners and Volvos (3 citations each) and Hyundai trucks and Peterbilts (2 citations each). The mix of vehicle makes suggests no particular equipment type is more vulnerable to this violation.
How severe is this compared to similar codes
Hazmat citations in the same regulatory family show dramatically different enforcement intensity. Our data indicates:
- 177.834(a) (general loading/unloading hazmat) generated 3,839 citations with a 97.9% OOS rate—nearly 500 times the citation volume of 172.334(b).
- 177.817(a) (placarding violation) resulted in 2,274 citations with a 75.1% OOS rate.
- 172.502(a)(1) (placarding general requirements) produced 1,820 citations with an 18.5% OOS rate.
- 172.602(c)(1) (maintenance of emergency response information) generated 1,464 citations with a 0.0% OOS rate—matching 172.334(b)'s zero OOS rate.
The fact that 172.334(b) sits at the low end of enforcement frequency but matches the OOS rate of codes like 172.602(c)(1) suggests that when this violation is cited, inspectors treat it as a documentation or labeling deficiency rather than an immediate safety hazard.
How to avoid it
Because 172.334(b) involves hazmat documentation and packaging standards, you can reduce risk through these pre-trip and load-acceptance practices:
- Review shipping papers before accepting a load. Verify that hazard class, proper shipping name, UN number, and packing group are clearly stated. Do not accept incomplete or illegible papers.
- Inspect container integrity at pickup. Check that boxes, drums, tanks, or bags are not damaged, leaking, or showing signs of previous content. A damaged container can trigger both this violation and more severe OOS citations.
- Confirm placards match the shipping papers. Even if your vehicle is placarded, compare the hazard class shown on placards to the hazmat class on your bill of lading. Mismatches indicate a documentation problem.
- Know your vehicle's allowable load. Some vehicles (particularly older Freightliners and Volvos, which appear in our citation data) may have weight or space restrictions for certain hazmat classes. Verify that the load you are offered complies with those limits.
- Ask the shipper for documentation of packaging certification. If a drum or container does not clearly show that it was packed according to DOT standards, request written confirmation before loading.
- Keep your cab organized for inspection. Store all shipping papers, emergency response information, and placarding guides in an accessible location. Clean, legible documents reduce the chance an inspector will note deficiencies.
Because this citation is rare, focus your hazmat compliance effort on the higher-volume violations like general loading/unloading standards and placarding accuracy. However, a citation for this code, while unlikely to result in an OOS order, will still count against your safety record and may trigger secondary inspections on future stops.