Type B, B(U), B(H) package not marked with radiation symbol
172.310D is a Markings - HM violation under 49 CFR §172.310D. It falls in the Hazardous Materials Compliance BASIC with a severity weight of 5/10.
Last updated May 2026
Think this violation was written incorrectly?
Generate a polished DataQs challenge letter for 172.310D in about 5 seconds. AI quotes the CFR, predicts your grant chance.
Notes
DSMS: N | Comment: Added in 3.11 | Footnote: This violation was added to SMS with the September 25, 2020 snapshot.If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Hazardous Materials.
Common ways to challenge this code
The materials transported did not exceed the threshold quantities requiring placards under 49 CFR Part 172 Subpart F.
Evidence that wins
This administrative code is on the inspection report but does not contribute to CSA BASIC scoring per FMCSA SMS Methodology Appendix A.
Evidence that wins
Common pitfalls — avoid these
Same BASIC category — ranked by national citation volume
HM (Packaging) - MC 330 tank must have a reflective design.
HM (Packaging) - MC 305 general requirements.
Driver - No driver shall use or permit the use of any flame-producing emergency signal for protecting any commercial motor vehicle transporting Division 1.1, Division 1.2, or Division 1.3 explosives.
HM (106A/110AW Multi-Unit Tank Car Tanks) - Improper safety relief device.
HM (Packaging) - DOT 412 general requirements.
HM (Packaging) - MC 312 improper venting requirements.
HM (Packaging) - MC 306 manhole requirements.
HM (Packaging) - MC 306/307/312 piping protection.
Codes under the same FMCSA violation group
HM (Placarding) - Required text is not present on a Class 7, DANGEROUS, or OXYGEN placard when requried.
HM RAM (Labeling) - Failing to display radioactive labels on Class 7 material on opposing sides of package as required.
HM (Markings) - Failing to mark a transport vehicle containing petroleum crude oil containing hydrogen sulfide (i.e., sour crude oil) as required.
HM (Markings) - Failing to mark a transport vehicle or freight container with non-bulk packages without proper ID numbers for materials that are poisonous by inhalation as required.
HM RAM (Markings) - Offering a radioactive material package greater than 50 kg (110 lbs) without gross mass.
No or improper marking of Flexible Bulk Containers
172.310D is the FMCSA roadside-inspection violation code for "Type B, B(U), B(H) package not marked with radiation symbol", part of the Markings - HM group, cited under 49 CFR §172.310D.
172.310D falls under the Hazardous Materials Compliance BASIC in the FMCSA Safety Measurement System (SMS).
172.310D carries a severity weight of 5 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Hazardous Materials Compliance score.
No. 172.310D is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.
The point contribution of 172.310D depends on its severity weight (5/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.
Yes. If you believe 172.310D was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.
Keep going
Statistics
Ranked by roadside-inspection citation count across FMCSA public data.
Inoperable Required Lamp
State vehicle registration or License Plate violation
Operating a CMV without proof of a periodic inspection
Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt
No/discharged/unsecured fire extinguisher
Inoperative turn signal
Operating a CMV without documentation of a periodic inspection.
Tire-flat and/or audible air leak
Wipers - Inoperative / missing / damaged wipers.
Violation of Local Laws - Explain:
State/Local Laws - State registration/tag violation.
Emergency Equipment - Stopped vehicle warning devices missing or impr…
State/Local Laws - Speeding 6-10 miles per hour over the speed limit.
Brake - Defective brake(s) are equal to or greater than 20% of the se…
No or defective lighting devices or reflective material as required
Inspection, repair and maintenance of parts and accessories
CMV manufactured after 10/19/94 has an automatic airbrake adjustment …
Tire-other tread depth less than 2/32 of inch measured in a major tre…
Tires - All others, leaking or inflation less than 50% of the maximum…
Carrier name and/or USDOT Number not displayed as required