TruckCodex

392.4A-POS — Use of drugs

FMCSA violation code under Controlled Substances/Alcohol. 655 events recorded in roadside inspections. Severity weight: 10.

Severity Weight
10
OOS Eligible
No
BASIC Category
Controlled Substances/Alcohol
Total Events
655
Code
392.4A-POS
Code System
FMCSR
BASIC Category
Controlled Substances/Alcohol
OOS Eligible
No
Severity Weight
10
Violation Group
—
Total Events
655
Carriers Cited
621

Violation Description

Driver or operator of a commercial motor vehicle found to be under the influence of or using a controlled substance or any substance that renders the driver incapable of safely operating the CMV.

About This Violation Code

Code 392.4A-POS falls under the Controlled Substances/Alcohol BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 10 (scale 1-10, higher = more severe).

When this violation is cited during a roadside inspection, it contributes to the carrier's Controlled Substances/Alcohol 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 392.4A in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
655
OOS Events
639
OOS Rate
97.6%
Top State (180d)
Iowa
63 events

Top Enforcing States

Where 392.4A-POS is most commonly cited (last 180 days)

1.Iowa
63
OOS 100.0%
2.Texas
41
OOS 100.0%
3.New Mexico
19
OOS 94.7%
4.North Carolina
8
OOS 100.0%
5.Illinois
3
OOS 100.0%

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

Citation Trend (12 months)

Monthly count of 392.4A-POS citations. Red bars mark months with OOS-triggering citations.

19
Apr
52
May
41
Jun
37
Jul
32
Aug
20
Sep
28
Oct
25
Nov
21
Dec
19
Jan
29
Feb
31
Mar
1
Apr

Most Active Stations

Inspection stations citing 392.4A-POS most often (last 180 days)

1.28 - I80 WB MM 44 AVOCA
10
OOS 100.0%
2.GALLUP PORT OF ENTRY
5
OOS 100.0%
3.10 - I35 NB MM 30 OSCEOLA
5
OOS 100.0%
4.ANTHONY PORT OF ENTRY
4
OOS 75.0%
5.SAN JON PORT OF ENTRY
4
OOS 100.0%
6.15 - I380 NB MM 51 BRANDON
4
OOS 100.0%
7.39 - I35 SB MM 212 NORTHWOOD
4
OOS 100.0%
8.01 - I80 WB MM 151 MITCHELLVIL
3
OOS 100.0%
9.45 - HWY 218 NB MM 29 PILOT GR
3
OOS 100.0%
10.US281 SB FALFURRIAS SCALE
3
OOS 100.0%

Often Cited Together

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

393.917 co-occurrences392.2RG13 co-occurrences395.8E12 co-occurrences396.17C11 co-occurrences395.24C2III10 co-occurrences392.4A-UI8 co-occurrences390.21TB7 co-occurrences392.5A37 co-occurrences393.75A16 co-occurrences395.8A-ELD6 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 621 carriers total • Page 1 of 25

Top Carriers with 392.4A-POS Violations

Showing 25 of 621

fmcsa-violations
Top Carriers with 392.4A-POS Violations
#CarrierUSDOT# Violations
#1NEW PRIME INC37064
#2BIG LEAGUE MOVERS INC19993183
#3JDIAZ TRUCKING LLC34931183
#4DAY TRANSFER COMPANY INC24411542
#5MATTHEW KIKER34078712
#6S & B TRUCKING LLC25021642
#7BENCHMARK BUILDING SUPPLY INC34937612
#8CURRY GLOBAL LOGISTICS INC44294812
#9DENVER CARGO INC35854162
#10MIRACLE MOVERS OF THE TRIAD LLC34508592
#11ATLAS VAN LINES INC1255502
#12BP FREIGHT INC28457492
#13TRICOLOR AUTO GROUP LLC37188062
#14MORRISON FAMILY TRUCKING LLC36998282
#15SPUDXAVIAR LLC37030842
#16MAINI TRUCKLINES CORPORATION22835362
#17D&E FREIGHT LLC38575212
#18JUST RIGHT LOGISTICS LLC39240092
#19HARGE LOGISTICS LLC27967332
#20LIA EXPRESS INC29978282
#21MORE SOLUTIONS LLC42814652
#22BIRKEY TRUCKING LLC20651132
#23T & J TRUCKING INC5659012
#24MEROEM AUTO TRANSPORTATION LLC42770572
#25VENTURE TRANSPORT LLC9117592

Recent Inspections

Latest inspections where 392.4A-POS was cited • 655 total events • Page 1 of 27

Recent Inspections with 392.4A-POS

Showing 25 of 655

fmcsa-inspections
Recent Inspections with 392.4A-POS
DateReport #StateLevelOOS
Apr 1, 202687477240NMLevel 2Yes
Mar 31, 202687467993TXLevel 1Yes
Mar 30, 202687466229TXLevel 2Yes
Mar 30, 202687468832TXLevel 1Yes
Mar 29, 202687453071IALevel 3Yes
Mar 27, 202687432766NMLevel 2No
Mar 25, 202687408704IALevel 3Yes
Mar 25, 202687441754TXLevel 2Yes
Mar 24, 202687408587IALevel 2Yes
Mar 22, 202687371283IALevel 2Yes
Mar 21, 202687371074IALevel 2Yes
Mar 20, 202687487334TXLevel 2Yes
Mar 19, 202687371250IALevel 3Yes
Mar 19, 202687397367TXLevel 2Yes
Mar 18, 202687333615NMLevel 1Yes
Mar 18, 202687373342TXLevel 2Yes
Mar 18, 202687371276IALevel 3Yes
Mar 17, 202687384903TXLevel 3Yes
Mar 14, 202687323580TXLevel 2Yes
Mar 13, 202687371748ILLevel 2Yes
Mar 12, 202687283615IALevel 3Yes
Mar 10, 202687285379TXLevel 2Yes
Mar 9, 202687264604TXLevel 2Yes
Mar 8, 202687251711IALevel 3Yes
Mar 4, 202687214255NCLevel 2Yes

Data sources & freshness

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

Related records

CategoryAll Controlled Substances/Alcohol Violations
Browse all violation codes in the Controlled Substances/Alcohol BASIC
IndexAll Violation Codes
FMCSR violation codes by BASIC category
ReferenceFMCSA Roadside Inspections
Inspection levels and procedures
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