TruckCodex

172.504A-HMPS — Placarding - table 1 materials

FMCSA violation code under Hazardous Materials. 407 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Hazardous Materials
Total Events
407
Code
172.504A-HMPS
Code System
FMCSR
BASIC Category
Hazardous Materials
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
407
Carriers Cited
352

Violation Description

Failure to placard for Table 1 hazardous materials (high hazard) at any quantity.

About This Violation Code

Code 172.504A-HMPS falls under the Hazardous Materials BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 8 (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 172.504A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
407
OOS Events
32
OOS Rate
7.9%
Top State (180d)
California
11 events

Top Enforcing States

Where 172.504A-HMPS is most commonly cited (last 180 days)

1.California
11
OOS 9.1%
2.Arizona
9
OOS 0.0%
3.Ohio
7
OOS 0.0%
4.Michigan
6
OOS 16.7%
5.Colorado
5
OOS 0.0%
6.Connecticut
5
OOS 20.0%
7.Kansas
4
OOS 0.0%
8.US
4
OOS 0.0%
9.Alabama
4
OOS 0.0%
10.Missouri
3
OOS 0.0%
11.Arkansas
3
OOS 0.0%
12.Pennsylvania
3
OOS 0.0%
13.Indiana
3
OOS 0.0%
14.New York
3
OOS 0.0%
15.Montana
3
OOS 0.0%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 172.504A-HMPS citations. Red bars mark months with OOS-triggering citations.

7
Apr
18
May
23
Jun
19
Jul
13
Aug
18
Sep
17
Oct
22
Nov
24
Dec
22
Jan
17
Feb
19
Mar
1
Apr

Most Active Stations

Inspection stations citing 172.504A-HMPS most often (last 180 days)

1.SOUTH HAVEN KS
3
OOS 0.0%
2.YUMA AZ
3
OOS 0.0%
3.HEFLIN AL
2
OOS 0.0%
4.GREENWICH SCALE
2
OOS 0.0%
5.GRAPEVINE CVEF
2
OOS 0.0%
6.GARY IN
2
OOS 0.0%
7.SEFFNER FL
2
OOS 0.0%
8.EHRENBERG AZ
2
OOS 0.0%
9.TRINIDAD CO
2
OOS 0.0%
10.BLUE WATER BRIDGE
2
OOS 0.0%

Often Cited Together

Other violations commonly found on the same inspection (last 90 days)

172.516A-HMPS5 co-occurrences392.2-SLLSR5 co-occurrences396.17C-PI5 co-occurrences172.516C6-HMPMC4 co-occurrences383.23A2-LCDL4 co-occurrences107.620B-HMAMC4 co-occurrences393.9A-LIL4 co-occurrences393.78A-WS3 co-occurrences172.200A-HMSPS3 co-occurrences171.2D-HMGRMC3 co-occurrences

Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).

Top Carriers Cited

Ranked by frequency • 352 carriers total • Page 1 of 15

Top Carriers with 172.504A-HMPS Violations

Showing 25 of 352

fmcsa-violations
Top Carriers with 172.504A-HMPS Violations
#CarrierUSDOT# Violations
#1GREENWOOD MOTOR LINES INC633917
#2OLD DOMINION FREIGHT LINE INC908495
#3XPO LOGISTICS FREIGHT INC2418295
#4SILVICOM INC18644954
#5J B HUNT TRANSPORT INC808063
#6NAPORA INC16108703
#7CENTRAL TRANSPORT LLC6611733
#8BUCCI EXPRESS INC22859383
#9FAWADI LOGISTICS LLC34481103
#10USA LOGISTICS INC18929383
#11TRANSPORTATION COMMODITIES INC5825962
#12ABF FREIGHT SYSTEM INC828662
#13SSL TRUCKING INC39271672
#14LAKES GAS CO3195702
#15UZB FREIGHT INC29602002
#16QUEST LINER INC16090382
#17B H 92 TRUCKING INC15769462
#18JPS CARRIERS INC22663572
#19VEDDER TRANSPORT LTD6533402
#20MELTON TRUCK LINES INC346662
#21102009104 SASKATCHEWAN LTD30967772
#22DISTRIBUTOR OPERATIONS INC3999532
#23PPG ROADLINES INC31206952
#24SOLID TRANSPORT INC25114532
#25PITT OHIO EXPRESS LLC1901802

Recent Inspections

Latest inspections where 172.504A-HMPS was cited • 407 total events • Page 1 of 17

Recent Inspections with 172.504A-HMPS

Showing 25 of 407

fmcsa-inspections
Recent Inspections with 172.504A-HMPS
DateReport #StateLevelOOS
Apr 1, 202687481820AZLevel 2No
Mar 31, 202687473269AZLevel 2No
Mar 31, 202687471364CALevel 2No
Mar 25, 202687393926ORLevel 1No
Mar 24, 202687389091WVLevel 2No
Mar 24, 202687381724ORLevel 2No
Mar 23, 202687354425ALLevel 1No
Mar 23, 202687388191FLLevel 1No
Mar 20, 202687349740MTLevel 2No
Mar 19, 202687392012USLevel 2No
Mar 19, 202687373075WYLevel 2No
Mar 19, 202687388598RILevel 1No
Mar 18, 202687321420MOLevel 2No
Mar 11, 202687281357COLevel 2No
Mar 11, 202687270630UTLevel 1No
Mar 10, 202687267703CALevel 2No
Mar 10, 202687262811WYLevel 1Yes
Mar 9, 202687237884CTLevel 2No
Mar 1, 202687196139ARLevel 2No
Feb 25, 202687197982MTLevel 2No
Feb 23, 202687132483CALevel 1No
Feb 19, 202687145273MTLevel 2No
Feb 18, 202687365081NJLevel 2No
Feb 17, 202687123200NYLevel 2No
Feb 17, 202687095103WILevel 2No

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Unknown freshness
Federal Motor Carrier Safety Regulations (49 CFR)
Unknown freshness

Related records

CategoryAll Hazardous Materials Violations
Browse all violation codes in the Hazardous Materials BASIC
IndexAll Violation Codes
FMCSR violation codes by BASIC category
ReferenceFMCSA Roadside Inspections
Inspection levels and procedures
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