397.7B-HMDP — Hazmat parking violation
FMCSA violation code under Hazardous Materials. 20 events recorded in roadside inspections. Severity weight: 6.
Violation Description
Parking a commercial motor vehicle carrying hazardous materials in an unauthorized location.
About This Violation Code
Code 397.7B-HMDP falls under the Hazardous Materials BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 6 (scale 1-10, higher = more severe).
When this violation is cited during a roadside inspection, it contributes to the carrier's Hazardous Materials BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.
Regulatory Reference
Federal Motor Carrier Safety Regulations
This violation references 49 CFR 397.7B in the Federal Motor Carrier Safety Regulations.
Top Enforcing States
Where 397.7B-HMDP is most commonly cited (last 180 days)
Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.
Citation Trend (12 months)
Monthly count of 397.7B-HMDP citations. Red bars mark months with OOS-triggering citations.
Most Active Stations
Inspection stations citing 397.7B-HMDP most often (last 180 days)
Often Cited Together
Other violations commonly found on the same inspection (last 90 days)
Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).
Top Carriers Cited
Ranked by frequency • 20 carriers total
Top Carriers with 397.7B-HMDP Violations
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | HEATWAVE OIL LLC | 2196447 | 1 |
| #2 | CAL-CLEVE LIMITED | 205915 | 1 |
| #3 | MERCER TRANSPORTATION CO INC | 154712 | 1 |
| #4 | MATRIX LOGISTICS INC | 3157032 | 1 |
| #5 | AMERICAN ROAD TRANSPORTATION INC | 2073530 | 1 |
| #6 | HOP ENERGY LLC | 634907 | 1 |
| #7 | 440411 ONTARIO LTD | 332369 | 1 |
| #8 | SEI ACQUISITION LLC | 484360 | 1 |
| #9 | OAP TRANSPORTATION LLC | 222024 | 1 |
| #10 | VL TRUCKING EXPRESS INC | 2931850 | 1 |
| #11 | IMG TRUCKING INC | 1943083 | 1 |
| #12 | DIAMOND B OPERATING LLC | 2120653 | 1 |
| #13 | ABN TRANSPORT INC | 2862728 | 1 |
| #14 | SAMUEL CORALUZZO CO INC | 156123 | 1 |
| #15 | MIM EXPRESS INC | 2251572 | 1 |
| #16 | HIGHWAY TRANSPORT CHEMICAL LLC | 41216 | 1 |
| #17 | COUGAR MOUNTAIN ENTERPRISES LLC | 1398023 | 1 |
| #18 | ALTOM TRANSPORT INC | 297572 | 1 |
| #19 | INSANE MOTORSPORTS INC | 2096293 | 1 |
| #20 | RYDER TRANSPORTATION SOLUTIONS LLC | 299073 | 1 |
Recent Inspections
Latest inspections where 397.7B-HMDP was cited • 20 total events
Recent Inspections with 397.7B-HMDP
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| Mar 9, 2026 | 87296062 | MD | Level 2 | No |
| Mar 6, 2026 | 87248116 | LA | Level 3 | No |
| Mar 3, 2026 | 87201162 | LA | Level 3 | No |
| Feb 10, 2026 | 87015656 | LA | Level 3 | No |
| Jan 19, 2026 | 86836782 | LA | Level 3 | No |
| Dec 29, 2025 | 86688324 | LA | Level 3 | No |
| Nov 6, 2025 | 86262891 | NH | Level 2 | No |
| Nov 4, 2025 | 86230192 | LA | Level 3 | No |
| Oct 28, 2025 | 86164919 | LA | Level 3 | No |
| Oct 2, 2025 | 85963804 | LA | Level 2 | No |
| Jul 3, 2025 | 85134021 | LA | Level 3 | No |
| Jun 23, 2025 | 85030981 | PA | Level 2 | No |
| May 28, 2025 | 84822334 | LA | Level 3 | No |
| May 22, 2025 | 84787855 | PA | Level 1 | No |
| May 21, 2025 | 84735166 | LA | Level 3 | No |
| Mar 11, 2025 | 84086759 | LA | Level 2 | No |
| Feb 17, 2025 | 83894545 | PA | Level 1 | No |
| Jan 20, 2025 | 83653577 | LA | Level 3 | No |
| Dec 6, 2024 | 83383607 | GA | Level 2 | No |
| Nov 22, 2024 | 83269266 | AZ | Level 2 | No |