What 172.310B means in plain language
172.310B is a hazardous materials regulation that governs specific requirements for shipping papers and documentation when transporting hazmat cargo. The rule establishes that certain hazmat shipments must be accompanied by proper shipping papers that meet federal specifications—including accurate descriptions of the material being transported, proper hazard classification, and all required emergency response information.
In practical terms: if you're hauling hazmat, the shipping papers in your cab must match the cargo in your trailer, be legible, and be immediately accessible to inspectors or emergency responders. The papers must contain the correct technical names, hazard class designations, and any special handling or emergency instructions required by DOT.
This is a documentation compliance issue, not a vehicle safety issue. An inspector will cite 172.310B when they find shipping papers that are incomplete, inaccurate, or fail to meet the format and content standards set by the FMCSR.
What our enforcement data actually shows
Across 13 million roadside inspection records, 172.310B is cited extremely rarely. Our database shows only 1 citation on record, with that citation occurring in the past 12 months. Over the last 90 days, we have recorded 0 citations for this code.
When 172.310B citations do occur, they are not placed out of service. Our data shows a 0.0% out-of-service rate for this code—meaning every citation we've recorded resulted in a warning or non-critical citation status. This stands in sharp contrast to the all-FMCSR average out-of-service rate of 31.4%. Ranked #2796 of 3,036 FMCSR codes by citation volume, 172.310B is among the least-cited regulations in the hazardous materials category.
The rarity of enforcement suggests that either compliance with this rule is nearly universal, or inspectors prioritize other hazmat violations that carry higher safety risk. Either way, if you've been cited for 172.310B, you're dealing with an uncommon citation that is unlikely to trigger immediate out-of-service action.
Who gets cited most
Our inspection records show that 172.310B citations are so infrequent that meaningful geographic or carrier-level patterns are not evident from the available data. The single citation in our database was issued to a RAM vehicle operated under ALPHA TESTING LLC (USDOT 432419) in August 2025. With only one citation across 13 million inspections, state-by-state analysis and multi-carrier trends are not statistically reliable.
This extreme rarity actually works in your favor: it suggests that most fleets and drivers are compliant with shipping paper requirements, and inspectors are not aggressively targeting this particular regulation.
How severe is this compared to similar codes
To understand the relative severity of 172.310B, it helps to compare it to other hazmat shipping and documentation rules.
177.834A-HMC (General loading/unloading hazmat) has seen 3,954 citations across our database, with a 99.2% out-of-service rate. This code addresses the actual handling and securing of hazmat cargo, and the extremely high OOS rate reflects DOT's zero-tolerance approach to improper loading.
172.502(a)(1) (Placarding general requirements) shows 1,820 citations with an 18.5% out-of-service rate. Like 172.310B, this is a documentation/marking rule, but it appears in enforcement far more frequently—over 1,800 times compared to once for 172.310B.
172.602(c)(1) (Maintenance/accessibility of Emergency Response information) has recorded 1,464 citations with a 0.0% out-of-service rate, matching 172.310B's zero OOS outcome. This suggests that shipping paper and documentation violations in the 172.x series are typically handled as correctable defects rather than safety-critical stops.
The takeaway: 172.310B is a low-enforcement, low-consequence citation type. Inspectors are far more focused on the actual handling, loading, and placarding of hazmat than on the specific format and content of shipping papers.
How to avoid it
Since 172.310B involves shipping paper compliance, prevention is straightforward:
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Verify shipping papers before loading. Before accepting a hazmat load, physically inspect the shipping papers in your possession. Confirm that the material description matches the cargo, that hazard class and ID numbers are present and correct, and that the papers are legible and not torn or faded.
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Know what must be on the papers. Shipping papers must include the proper shipping name of the hazmat, the hazard class, the UN/NA ID number, the total quantity, and emergency response contact information. If any field is missing or unclear, do not accept the load.
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Keep papers accessible during transport. Store shipping papers in the cab where you can retrieve them within 30 seconds. Do not bury them in a logbook or file box. Inspectors expect immediate access.
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Update papers if cargo changes. If you make any stops or partial deliveries that reduce the quantity, ensure that the shipping papers reflect the current cargo. Discrepancies between papers and load are a red flag.
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Request corrected papers if you find errors. If you discover that shipping papers do not accurately describe the cargo or are missing required information, contact the shipper immediately and request corrected documentation before departing.
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Pre-trip inspection focus. During your vehicle inspection, make shipping paper verification part of your routine. A few seconds of review at the start of a shift can prevent an inspection citation.
Because this code is so rarely cited, focus your hazmat compliance effort on the higher-enforcement rules: proper placarding, secure loading, and correct vehicle placarding. But do not ignore shipping papers—they are the legal record of what you're carrying, and accuracy is your first line of defense in any roadside interaction.