TruckCodex

393.55B — Coupling device/towing methods defective

FMCSA violation code under Vehicle Maintenance. 301 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
301
Code
393.55B
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
301
Carriers Cited
286

Violation Description

Coupling devices or towing methods on commercial motor vehicle are defective or inadequate.

About This Violation Code

Code 393.55B falls under the Vehicle Maintenance 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 Vehicle Maintenance 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 393.55B in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
301
OOS Events
0
OOS Rate
0.0%
Top State (180d)
Texas
54 events

Top Enforcing States

Where 393.55B is most commonly cited (last 180 days)

1.Texas
54
OOS 0.0%
2.Illinois
10
OOS 0.0%
3.North Carolina
3
OOS 0.0%
4.Iowa
2
OOS 0.0%
5.New Mexico
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 393.55B citations. Red bars mark months with OOS-triggering citations.

3
Apr
9
May
14
Jun
16
Jul
15
Aug
5
Sep
9
Oct
3
Nov
10
Dec
16
Jan
18
Feb
20
Mar

Most Active Stations

Inspection stations citing 393.55B most often (last 180 days)

1.IH-0030 IN DALLAS CO. (32-64)
6
OOS 0.0%
2.SH-0225 IN HARRIS CO. (686-700
4
OOS 0.0%
3.COLUMBIA POE
3
OOS 0.0%
4.8701 IH 30 FRONTAGE
3
OOS 0.0%
5.US-30
2
OOS 0.0%
6.LAT:31 30' 18.72N
2
OOS 0.0%
7.PHARR POE
2
OOS 0.0%
8.ASHEVILLE WEIGH STATION, I-40,
1
OOS 0.0%
9.I-64
1
OOS 0.0%
10.0V US281 EB
1
OOS 0.0%

Often Cited Together

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

393.922 co-occurrences392.2RG18 co-occurrences393.95A16 co-occurrences395.813 co-occurrences393.48A12 co-occurrences396.17C11 co-occurrences393.1110 co-occurrences393.95F8 co-occurrences390.21(a)8 co-occurrences393.788 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 286 carriers total • Page 1 of 12

Top Carriers with 393.55B Violations

Showing 25 of 286

fmcsa-violations
Top Carriers with 393.55B Violations
#CarrierUSDOT# Violations
#1FEDERAL EXPRESS CORPORATION868767
#2POTROS CONCRETE LLC35087722
#3DAY'S LOGISTICS LLC39244162
#4FORTUNE COACH INC28008032
#5SMITH EMPIRE LLC24520992
#6MVT SERVICES LLC2701792
#7MR VALDEZ TRUCKING INC21119962
#8BLACK BIRD LOGISTICS INC33701222
#9MEGA DISCOUNTS LLC29910092
#10KIK UNDERGROUND LLC34602952
#11HLC ENTERPRISES INC19455021
#12ENRIQUE AVILA CEBALLOS26348941
#13REVOLUCION TRUCKING LLC43642581
#14STEVEN E RAHN13425441
#15ANP TRANSPORT INC41793491
#16CLAUDIA GONZALEZ CHAVEZ33119131
#17MALDONADO TRUCKING GROUP LLC19440451
#18KL TRUCKING LLC28165931
#19MILLER PIPELINE LLC2401061
#20WERC SERVICES CORP29846911
#21SELECT READY MIX LLC31372641
#22ISABEL CRISTINA PEREZ GARCIA40700751
#23AGRI-EMPRESA TRANSPORTATION LLC2669861
#24MP UNDERGROUND CONSTRUCTION LLC44534541
#25GULF TRANSPORT INC20426471

Recent Inspections

Latest inspections where 393.55B was cited • 301 total events • Page 1 of 13

Recent Inspections with 393.55B

Showing 25 of 301

fmcsa-inspections
Recent Inspections with 393.55B
DateReport #StateLevelOOS
Mar 24, 202687423113TXLevel 2No
Mar 23, 202687410155TXLevel 1No
Mar 18, 202687333814ILLevel 5No
Mar 18, 202687385479TXLevel 2No
Mar 13, 202687290940ILLevel 1No
Mar 12, 202687323850TXLevel 2No
Mar 11, 202687275910TXLevel 1No
Mar 10, 202687440990TXLevel 1No
Mar 9, 202687276226TXLevel 2No
Mar 9, 202687276548TXLevel 2No
Mar 6, 202687254387TXLevel 2No
Mar 5, 202687252702TXLevel 1No
Mar 5, 202687254429TXLevel 2No
Mar 4, 202687254146TXLevel 2No
Mar 4, 202687215381ILLevel 1No
Mar 4, 202687215380ILLevel 1No
Mar 4, 202687253827TXLevel 2No
Mar 3, 202687205841TXLevel 2No
Mar 3, 202687215882TXLevel 2No
Feb 27, 202687204385TXLevel 2No
Feb 27, 202687183936TXLevel 1No
Feb 26, 202687205255TXLevel 1No
Feb 24, 202687166586TXLevel 1No
Feb 23, 202687183081TXLevel 2No
Feb 20, 202687154863TXLevel 1No

Data sources & freshness

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

Related records

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