FMCSR 397.7 Hazmat Parking Violation: Your Q&A

No. Across our inspection database, 397.7 has never resulted in an out-of-service placement—the OOS rate is 0.0%. However, 397.7 is eligible for OOS status if an inspector determines the hazmat parking violation creates an immediate safety risk. This means while enforcement data shows no actual OOS placements to date, the regulation carries that authority. Compare this to related hazmat violations: general loading/unloading violations (177.834A-HMC) have a 99.2% OOS rate, and placarding violations (177.817(a)) sit at 75.1%. Your parking infraction is treated much less severely in practice.

A 397.7 citation carries a CSA severity weight of 6 points. This weight applies within the 30-day rolling period—meaning if you receive multiple 397.7 citations within 30 days, each one adds 6 points to your record. The severity weight of 6 places this violation in the moderate range compared to hazmat-related codes; for context, placarding violations can carry higher severity depending on the specific infraction. These points accumulate in your BASIC 6 category and factor into your overall CSA score, which carriers and authorities use to assess compliance risk.

1. Document the location. Write down the exact spot where the vehicle was parked and why it was there (if permitted or mitigating). 2. Review your manifest and placards. Confirm all hazmat labeling and load documentation are correct. 3. Check your company's hazmat parking policy. Ensure you and your fleet understand authorized vs. unauthorized parking locations. 4. Photograph the scene. If safe, capture images showing signage, lot conditions, or other context. 5. Report to your fleet safety manager immediately. They need to update your file and may prepare a DataQs contest if the citation is factually incorrect. 6. Request the inspection report. Get the official citation details within 30 days to understand the violation basis.

397.7 is treated as a lower-priority hazmat violation in enforcement practice. Our records show zero all-time citations for 397.7, meaning it is extremely rare compared to related hazmat codes. For example, general loading/unloading violations (177.834A-HMC) have 3,954 citations and a 99.2% OOS rate; placarding violations (177.817(a)) have 2,274 citations at 75.1% OOS; and damaged placard violations (177.817(e)) have 2,038 citations at just 5.2% OOS. The fact that 397.7 appears zero times in 13 million inspections suggests inspectors rarely cite this code, or parking violations are often rolled into broader hazmat findings. This rarity actually works in your favor—it signals the violation is not a high-enforcement priority.

Yes. DataQs (FMCSA's Online Roadside Inspection Dispute Resolution System) allows you to contest factual errors in your citation record. For 397.7, you can challenge the citation if: (1) the location was actually authorized for hazmat parking, (2) the vehicle was not carrying hazardous materials, or (3) the inspector misidentified the load type or placarding. Submit your contest within 90 days of the inspection with supporting documentation—lot permits, signed load manifests, photographic evidence, or written authorization from the facility owner. Documentation-based challenges (proving the lot was authorized) are stronger than subjective disputes. Work with your safety manager or compliance team to file; they have experience with the DataQs process.

Our inspection records show zero citations for 397.7 across all states in the database. This means there are no top states or geographic hotspots for this violation. The complete absence of citations suggests 397.7 is either not being enforced systematically, is being addressed under different hazmat codes, or applies to such specific circumstances that it rarely appears in roadside inspections. If you receive a 397.7 citation, it is an outlier in national enforcement patterns—your fleet safety manager should treat it as unusual and investigate whether the inspector applied the right code.

Because 397.7 carries a 0.0% out-of-service rate and zero enforcement volume in 13 million inspections, urgency depends on whether a second citation is likely. The violation itself does not demand immediate vehicle repairs or load changes. Instead, focus on procedural compliance: update your hazmat parking procedures, train drivers on authorized parking locations for loads, and document your parking protocols. Since the last 90 days and last 12 months both show zero 397.7 citations, this is not a high-frequency enforcement area. Treat it as a compliance-training opportunity rather than an emergency equipment or maintenance issue.

397.7 violations impact both the driver and the carrier. In the FMCSA CSA program, BASIC 6 violations (where 397.7 belongs) appear on both the individual driver's profile and the carrier's safety management record. This means the citation affects your personal safety record and your company's fleet compliance score. However, the cause of the violation typically rests with operational decisions—whether parking was authorized depends on company policy, lot conditions, and dispatch instructions. Work with your safety manager to determine if the citation reflects a driver decision or a system breakdown, then address it accordingly in training or policy updates.