TruckCodex

392.4A-DOSP — Use of drugs

FMCSA violation code under Controlled Substances/Alcohol. 3,947 events recorded in roadside inspections. Severity weight: 10.

Severity Weight
10
OOS Eligible
No
BASIC Category
Controlled Substances/Alcohol
Total Events
3,947
Code
392.4A-DOSP
Code System
FMCSR
BASIC Category
Controlled Substances/Alcohol
OOS Eligible
No
Severity Weight
10
Violation Group
—
Total Events
3,947
Carriers Cited
3,372

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-DOSP 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)
3,947
OOS Events
3,786
OOS Rate
95.9%
Top State (180d)
Georgia
222 events

Top Enforcing States

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

1.Georgia
222
OOS 95.0%
2.Mississippi
104
OOS 88.5%
3.Arkansas
63
OOS 98.4%
4.South Carolina
61
OOS 91.8%
5.Arizona
54
OOS 98.1%
6.Indiana
47
OOS 97.9%
7.Tennessee
43
OOS 95.3%
8.Kansas
39
OOS 100.0%
9.New York
39
OOS 100.0%
10.Alabama
38
OOS 100.0%
11.Massachusetts
37
OOS 100.0%
12.Wyoming
31
OOS 96.8%
13.Pennsylvania
30
OOS 96.7%
14.Maryland
29
OOS 100.0%
15.Missouri
29
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-DOSP citations. Red bars mark months with OOS-triggering citations.

64
Apr
250
May
201
Jun
249
Jul
219
Aug
263
Sep
233
Oct
214
Nov
220
Dec
209
Jan
209
Feb
237
Mar
8
Apr

Most Active Stations

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

1.FORSYTH GA
29
OOS 100.0%
2.JOPLIN MO
17
OOS 100.0%
3.VAN BUREN AR
16
OOS 100.0%
4.GREENVILLE SC
13
OOS 92.3%
5.VALDOSTA GA
13
OOS 92.3%
6.GROVETOWN GA
13
OOS 92.3%
7.SAVANNAH GA
12
OOS 91.7%
8.TISHOMINGO COUNTY
11
OOS 72.7%
9.HOPE AR
9
OOS 100.0%
10.CARNESVILLE GA
9
OOS 100.0%

Often Cited Together

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

392.4A-DOSU100 co-occurrences395.8A1-HOSP89 co-occurrences396.17C-PI78 co-occurrences391.41APC66 co-occurrences392.2-SLLSR63 co-occurrences390.21TB2-DOT60 co-occurrences392.2-SLL56 co-occurrences390.21TB1-MC47 co-occurrences395.8E-HOSPD38 co-occurrences393.95A135 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 3,372 carriers total • Page 1 of 135

Top Carriers with 392.4A-DOSP Violations

Showing 25 of 3,372

fmcsa-violations
Top Carriers with 392.4A-DOSP Violations
#CarrierUSDOT# Violations
#1HOME EXPRESS DELIVERY SERVICE LLC27147019
#2WESTERN EXPRESS INC5114129
#3FEDERAL EXPRESS CORPORATION868768
#4PENSKE TRUCK LEASING CO LP3275748
#5A & A GRADING & HAULING INC5530226
#6GARCIA AYALA TRUCKING LLC39684186
#7CLOUDTRUCKS LLC33003186
#8GEORGETOWN GPT40978426
#9LOS ANGELES PARTYWORKS INC18264926
#10AUTHENTICRISS TRUCKING LLC34928805
#11T-ROY'S TRANSPORT AND LOGISTICS LLC41604005
#12NOVA FREIGHT LLC35096385
#13STEVENS TRANSPORT INC794665
#14FORSAGE INC25882315
#15UNITED VAN LINES LLC779495
#16FULMER CONCRETE FINISHING CO INC4435914
#17LUCKY WHEELS LLC32184194
#18STAR PARTNERS LLC33566234
#19D G LOGISTICS LLC8525874
#20TWIN CARRIER LLC35187354
#21MAQUETTE FINE ART SERVICES LLC23320734
#22CHESAPEAKE BAY MOVERS INC25273844
#23ONE4ALL LOGISTICS LLC40916534
#24AMONGUS TRANSPORTATION INC40621354
#25FIX AND RUN LLC37379124

Recent Inspections

Latest inspections where 392.4A-DOSP was cited • 3,947 total events • Page 1 of 158

Recent Inspections with 392.4A-DOSP

Showing 25 of 3,947

fmcsa-inspections
Recent Inspections with 392.4A-DOSP
DateReport #StateLevelOOS
Apr 1, 202687484074FLLevel 1Yes
Apr 1, 202687458444MTLevel 3Yes
Apr 1, 202687470275CALevel 3Yes
Apr 1, 202687459086SCLevel 2Yes
Apr 1, 202687474601ARLevel 1Yes
Apr 1, 202687475024ARLevel 3Yes
Apr 1, 202687475517ARLevel 3No
Apr 1, 202687476682MALevel 2Yes
Mar 31, 202687476553ALLevel 3Yes
Mar 31, 202687472771TNLevel 3Yes
Mar 31, 202687445786CTLevel 2Yes
Mar 31, 202687451189KSLevel 2Yes
Mar 31, 202687481764GALevel 3Yes
Mar 31, 202687478633WYLevel 3Yes
Mar 31, 202687465600OKLevel 1Yes
Mar 31, 202687452798MSLevel 2Yes
Mar 31, 202687453928NELevel 3Yes
Mar 31, 202687456736ORLevel 3Yes
Mar 31, 202687457052SCLevel 3Yes
Mar 31, 202687457181OHLevel 1Yes
Mar 30, 202687455637KSLevel 2Yes
Mar 30, 202687456350OHLevel 2Yes
Mar 30, 202687457834SCLevel 2Yes
Mar 30, 202687473039GALevel 1Yes
Mar 30, 202687472016UTLevel 3Yes

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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