TruckCodex

172.504A — Placarding - table 1 materials

FMCSA violation code under Hazardous Materials. 521 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Hazardous Materials
Total Events
521
Code
172.504A
Code System
FMCSR
BASIC Category
Hazardous Materials
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
521
Carriers Cited
412

Violation Description

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

About This Violation Code

Code 172.504A 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)
521
OOS Events
268
OOS Rate
51.4%
Top State (180d)
Texas
138 events

Top Enforcing States

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

1.Texas
138
OOS 67.4%
2.North Carolina
9
OOS 44.4%
3.New Mexico
9
OOS 66.7%
4.Illinois
7
OOS 71.4%
5.Iowa
2
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 citations. Red bars mark months with OOS-triggering citations.

11
Apr
29
May
16
Jun
20
Jul
18
Aug
20
Sep
34
Oct
20
Nov
37
Dec
25
Jan
43
Feb
27
Mar
1
Apr

Most Active Stations

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

1.CAMINO REAL POE
19
OOS 100.0%
2.IH-0030 IN DALLAS CO. (32-64)
4
OOS 50.0%
3.FM-1788 IN MIDLAND CO. (316-34
4
OOS 75.0%
4.EL CAMINO REAL POE
4
OOS 100.0%
5.INDIOS POE
4
OOS 50.0%
6.IH-0020 IN MIDLAND CO. (123-14
3
OOS 33.3%
7.YSLETA POE
3
OOS 33.3%
8.IH10 EB KINGSBURY SCALE
3
OOS 66.7%
9.IH35 SB DEVINE SCALE
3
OOS 100.0%
10.FM2294
2
OOS 50.0%

Often Cited Together

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

393.6727 co-occurrences177.817A25 co-occurrences393.918 co-occurrences107.60116 co-occurrences173.29A15 co-occurrences392.9AA115 co-occurrences392.2RG12 co-occurrences396.3A112 co-occurrences393.48A12 co-occurrences396.17C9 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 412 carriers total • Page 1 of 17

Top Carriers with 172.504A Violations

Showing 25 of 412

fmcsa-violations
Top Carriers with 172.504A Violations
#CarrierUSDOT# Violations
#1GREENWOOD MOTOR LINES INC6339111
#2TFORCE FREIGHT INC1210587
#3E F CORPORATION1136935
#4TRANSPORTES Y MAQUINARIA MORO SA DE CV37826275
#5SILVICOM INC18644954
#6ESTES EXPRESS LINES1210184
#7AAA COOPER TRANSPORTATION922614
#8ANTRIAVI SA DE CV35249073
#9BG ADVANCE SOLUTIONS INC31283563
#10ABDON RESENDEZ MIRELES37750233
#11LIGHTNING TRANSPORTATION LLC44828713
#12HIGHWAY TRANSPORT CHEMICAL LLC412163
#13LEAHY TRANSPORTATION LLC22757923
#14JULIO RODOLFO GONZALEZ OLVEDA29275083
#15TRUE CHEMICAL SOLUTIONS LLC29947843
#16SCHNEIDER NATIONAL BULK CARRIERS INC1643113
#17OAP TRANSPORTATION LLC2220243
#18JOSE LUIS VELARDE PEREZ34197143
#19FAWADI LOGISTICS LLC34481103
#20AQUARIUS CHEMICAL LLC32011563
#21JUAN GERARDO REYES VALADEZ43952423
#22BRANDON SALAZAR SNOWBALL44108183
#23AUTOTRANSPORTES VARELA DAVILA DE REYNOSA SA DE CV19394492
#24MAXFLOW CHEMICALS OF TEXAS LLC23698762
#25TRIBE LEASING LLC26286612

Recent Inspections

Latest inspections where 172.504A was cited • 521 total events • Page 1 of 21

Recent Inspections with 172.504A

Showing 25 of 521

fmcsa-inspections
Recent Inspections with 172.504A
DateReport #StateLevelOOS
Apr 1, 202687478901TXLevel 2Yes
Mar 30, 202687487432TXLevel 1Yes
Mar 27, 202687429155ILLevel 2No
Mar 27, 202687468709TXLevel 1Yes
Mar 26, 202687440941TXLevel 2No
Mar 26, 202687468224TXLevel 1Yes
Mar 25, 202687423985TXLevel 2Yes
Mar 25, 202687408599IALevel 2No
Mar 25, 202687442515TXLevel 1Yes
Mar 24, 202687408924ILLevel 2Yes
Mar 23, 202687386392TXLevel 2Yes
Mar 20, 202687374282TXLevel 1No
Mar 20, 202687422833TXLevel 2Yes
Mar 18, 202687384669TXLevel 2Yes
Mar 17, 202687344634TXLevel 2Yes
Mar 11, 202687303534TXLevel 2No
Mar 11, 202687276317TXLevel 1Yes
Mar 11, 202687276788TXLevel 1No
Mar 11, 202687285224TXLevel 2No
Mar 10, 202687284793TXLevel 2Yes
Mar 6, 202687265323TXLevel 2Yes
Mar 6, 202687254037TXLevel 1Yes
Mar 5, 202687253312TXLevel 2Yes
Mar 4, 202687215352ILLevel 2Yes
Mar 3, 202687262924TXLevel 1No

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
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