FMCSR 172.334(b) Citation Guide for Drivers

No. Across our inspection database, 172.334(b) citations result in an out-of-service placement 0.0% of the time—all 8 citations on record were issued without an OOS order. This is significantly better than the 31.4% average OOS rate across all FMCSR codes. Even so, the violation still appears on your safety record and can affect your carrier's CSA score.

This violation is relatively rare and low-enforcement compared to other hazmat violations. We've recorded only 8 citations all-time for 172.334(b), placing it at rank #2269 out of 3,036 FMCSR codes. By contrast, related hazmat loading violations (177.834A-HMC) have been cited 3,954 times with a 99.2% out-of-service rate. The fact that 172.334(b) has never resulted in an OOS order signals it's treated as a documentation or procedural issue rather than an immediate safety threat.

First, request the inspection report from your carrier or the DOT inspector. Second, photograph and document the specific item or condition cited—this is critical if you plan to contest the finding. Third, notify your fleet safety manager and request a copy of any relevant shipping papers, placards, or packaging documentation referenced in the citation. Finally, preserve all evidence for potential DataQs (FMCSA's dispute process) if you believe the citation was issued in error or based on incorrect facts.

172.334(b) is significantly less severe than peer hazmat violations in the same regulatory category. For example, general loading/unloading hazmat violations (177.834A-HMC) are cited 494× more often (3,954 vs. 8 citations) and carry a 99.2% out-of-service rate. Even placarding violations (177.817(a)) are cited 480× more frequently and result in OOS 97.9% of the time. The 0.0% OOS rate for 172.334(b) indicates inspectors treat it as a lower-severity infraction.

Yes, you or your carrier can file a DataQs (FMCSA Record Documentation Query) challenge within 90 days of the inspection. Because 172.334(b) typically involves documentation, placarding, or labeling requirements, DataQs challenges often succeed when you can provide written proof (bills of lading, shipping papers, photographs) that contradicts the inspector's findings. Gather your evidence immediately after the citation is issued; the longer you wait, the harder it is to reconstruct conditions.

The citation will be recorded in your safety profile and your carrier's CSA score, but because 172.334(b) has never resulted in an out-of-service order in our records, it carries less weight in the CSA scoring algorithm than OOS-eligible violations. The impact depends on your current safety profile—a single citation in isolation is less damaging than multiple violations. Ask your carrier for your current Safety Management Cycle scores to understand the cumulative effect.

This violation is uncommon. Our 13 million-record database shows only 8 citations ever issued for 172.334(b), with zero in the last 12 months and zero in the last 90 days. When it is cited, Freightliner and Volvo tractors account for the majority (3 citations each), followed by Hyundai and Peterbilt (2 each). No single carrier dominates the violation—all citations are distributed across eight different carriers, each with just one citation.

This violation is extremely rare and trending toward zero. Our database records 8 all-time citations, but zero citations in the last 12 months and zero in the last 90 days. This suggests the violation is either becoming less common due to improved compliance, or inspectors are enforcing related hazmat codes instead. The lack of recent enforcement activity means your focus should be on broader hazmat placarding and labeling best practices rather than worrying about this specific code.