What 397.67B-HMDP means in plain language
When you transport radioactive materials, the FMCSR require you to follow specific routing requirements. This code applies when you deviate from those prescribed routes without authorization. The regulation isn't just about taking the shortest path—it's about following approved corridors that have been designated safe for radioactive shipments, often based on population density, emergency response capability, and regulatory agreement between states.
If an inspector found this violation, it means your paperwork, GPS records, or actual route taken didn't match the approved shipping instructions for that radioactive load. This can happen if you misunderstood routing instructions, took a detour without updating your manifest, or didn't have the correct routing documentation in your cab.
What our enforcement data actually shows
Across our 13 million+ inspection records, 397.67B-HMDP citations are rare. We've recorded 27 all-time citations for this code, with 21 in the last 12 months and 5 in the last 90 days. This ranks 397.67B-HMDP at #1838 of 3,036 FMCSR codes by citation volume—making it an uncommon violation.
What's critical: 0 out of 27 citations resulted in an out-of-service order (0.0% OOS rate). This is dramatically lower than the all-FMCSR average of 31.4%. When inspectors find this violation, they're documenting it for your record and your carrier's safety profile, but they're not immediately taking you off the road. That said, the violation still carries a CSA severity weight of 9, meaning it matters in your Safety Management Cycle scores and your carrier's regulatory history.
Enforcement has been fairly steady over the past year. April and May 2025 saw the highest activity with 4 citations each month, while most other months showed 1 to 3 citations. This suggests enforcement is ongoing but not concentrated in any single region or season.
Who gets cited most
Our inspection records show the following states led in 397.67B-HMDP citations over the last 180 days:
- Colorado: 4 citations, 0 out-of-service (0.0% rate)
- Ohio: 3 citations, 0 out-of-service (0.0% rate)
- Massachusetts: 1 citation, 0 out-of-service (0.0% rate)
All three states maintain a 0.0% out-of-service rate, consistent with the national pattern. The higher frequency in Colorado and Ohio may reflect heavier radioactive material transport corridors or more active hazmat inspection programs in those regions.
Regarding carriers, our data shows fleets such as Greenwood Motor Lines Inc (USDOT 63391) and Broco Oil Inc (USDOT 2148486) each with 2 citations in our all-time records. Sultan Trans Inc (USDOT 2365671) also appears with 2 citations. This does not imply systematic negligence—it reflects that radioactive materials transport, while uncommon across the industry, concentrates among a smaller set of specialized carriers.
How severe is this compared to similar codes
Within the Hazardous Materials category, radioactive routing violations are far less frequent than other hazmat infractions. For perspective:
- 177.834A-HMC (General loading/unloading hazmat) has 3,954 citations with a 99.2% OOS rate—meaning nearly all inspectors place drivers out of service for loading errors.
- 177.817(a) (Placarding violation) has 2,274 citations with a 75.1% OOS rate—a serious violation that frequently results in immediate removal from service.
- 172.602(c)(1) (Maintenance/accessibility of Emergency Response information) has 1,464 citations with a 0.0% OOS rate, matching 397.67B-HMDP's pattern.
397.67B-HMDP sits at the lower end of enforcement frequency and OOS severity compared to loading/unloading and placarding violations, but it's still documented as a hazmat compliance failure.
How to avoid it
Before you load: Confirm the routing instructions are in your shipping papers or your carrier's routing system. Ask your dispatcher or safety manager to confirm the approved route if you're unsure. Don't assume a general route is acceptable for radioactive materials—they require pre-approved corridors.
During pre-trip: Cross-check your route on a map against your manifest. If your GPS suggests a faster route that differs from approved instructions, do not deviate. Radioactive routing is non-negotiable; faster isn't better.
If you must detour: Contact your dispatcher immediately if weather, traffic, or an accident forces you off the approved route. Get written or recorded authorization before you divert. Update your shipping papers or manifest system if your carrier requires it.
Vehicle inspection focus: While 397.67B-HMDP itself is a routing violation, our co-occurring citation data shows that when drivers are cited for routing failures, brake system issues and hours-of-service record problems sometimes appear on the same inspection. Ensure your vehicle's brakes and safety systems pass pre-trip inspection, and maintain accurate logbook entries. These practices reduce inspector scrutiny overall and keep your focus on compliance.
Know your equipment: Our inspection records show Freightliners (10 citations), Great Dane trailers (6 citations), and Peterbilt tractors (5 citations) appear most frequently in 397.67B-HMDP citations. This likely reflects their prevalence in hazmat fleets, not a defect in the equipment. Use it as a reminder that if you operate these vehicle types, hazmat compliance is part of your standard operating procedure.
Bottom line: Get routing confirmation in writing before you move radioactive materials, follow it precisely, and contact your dispatcher if you must deviate. The 0.0% out-of-service rate suggests inspectors view this as a documentation and procedural error rather than an immediate safety threat—but it still affects your safety record and your carrier's metrics. Fix it now to prevent future citations.