TruckCodex

393.55D2 — Coupling device/towing methods defective

FMCSA violation code under Vehicle Maintenance. 2,884 events recorded in roadside inspections. Severity weight: 8.

Severity Weight
8
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
2,884
Code
393.55D2
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
8
Violation Group
—
Total Events
2,884
Carriers Cited
2,425

Violation Description

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

About This Violation Code

Code 393.55D2 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 393.55D2 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
2,884
OOS Events
4
OOS Rate
0.1%
Top State (180d)
Texas
727 events

Top Enforcing States

Where 393.55D2 is most commonly cited (last 180 days)

1.Texas
727
OOS 0.1%
2.Illinois
66
OOS 0.0%
3.Iowa
63
OOS 0.0%
4.New Mexico
2
OOS 0.0%
5.North Carolina
1
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 393.55D2 citations. Red bars mark months with OOS-triggering citations.

76
Apr
155
May
156
Jun
194
Jul
147
Aug
165
Sep
197
Oct
133
Nov
163
Dec
136
Jan
167
Feb
179
Mar
6
Apr

Most Active Stations

Inspection stations citing 393.55D2 most often (last 180 days)

1.US77 RIVIERA SCALE
34
OOS 0.0%
2.SH-0225 IN HARRIS CO. (686-700
24
OOS 0.0%
3.IH-0030 IN DALLAS CO. (32-64)
19
OOS 0.0%
4.BOTA POE
19
OOS 0.0%
5.SH-0146 IN HARRIS CO. (482-500
18
OOS 5.6%
6.IH35 SB SAN MARCOS SCALE
17
OOS 0.0%
7.IH-0820 IN TARRANT CO. (0-34)
15
OOS 0.0%
8.US-0290 IN HARRIS CO. (706-738
14
OOS 0.0%
9.714M US281 NB
13
OOS 0.0%
10.IH-0030 IN TARRANT CO. (2-31)
13
OOS 0.0%

Often Cited Together

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

393.9256 co-occurrences393.47E146 co-occurrences392.2RG141 co-occurrences396.17C108 co-occurrences393.55E104 co-occurrences392.2W100 co-occurrences393.7894 co-occurrences393.45B2UV76 co-occurrences393.53B74 co-occurrences396.3A171 co-occurrences

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

Top Carriers Cited

Ranked by frequency • 2,425 carriers total • Page 1 of 97

Top Carriers with 393.55D2 Violations

Showing 25 of 2,425

fmcsa-violations
Top Carriers with 393.55D2 Violations
#CarrierUSDOT# Violations
#1NATIONAL DRAYAGE SERVICES DE LLC17470938
#2EVANS DELIVERY COMPANY INC381117
#3SERVICIO INTERNACIONAL DE ENLACE TERRESTRE SA DE CV8181757
#4MC7 TRANSIT LLC25007956
#5CLARK FREIGHT LINES INC3653706
#6AGGREGATE HAULERS I L P10214856
#7E TRANSPORTS LLC20504896
#8A & N TRANSPORTS LLC34241665
#9JAIME CORONADO15381275
#10TEXAS INTERNATIONAL ENTERPRISES INC21969125
#11WILLIAMS BROTHERS CONSTRUCTION CO INC276415
#12ESTRADA READY MIX CONCRETE LLC29916835
#13TRIPLE AD ENTERPRISES LLC34562625
#14DOUBLE D TRANSPORT LLC30921205
#15J B HUNT TRANSPORT INC808065
#16FORCE LOGISTICS US LLC28780885
#17RTS HOLDINGS LLC23653085
#18AUTOTRANSPORTES ROMEDU SA DE CV11482594
#19ZT EQUIPMENT LLC23708064
#20FEATHERLITE LOGISTICS LLC28201434
#21TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V10419074
#22JIREH TRUCKING OF TEXAS LLC44014224
#23FAST TRANSPORT LLC41937804
#247G'S TRUCKING INC24296124
#25ADAPTED LOGISTICS LLC29386334

Recent Inspections

Latest inspections where 393.55D2 was cited • 2,884 total events • Page 1 of 116

Recent Inspections with 393.55D2

Showing 25 of 2,884

fmcsa-inspections
Recent Inspections with 393.55D2
DateReport #StateLevelOOS
Apr 2, 202687486822ILLevel 2No
Apr 2, 202687486760ILLevel 1No
Apr 2, 202687487922TXLevel 1No
Apr 1, 202687477439IALevel 2No
Apr 1, 202687477672ILLevel 1No
Apr 1, 202687479286TXLevel 1No
Mar 31, 202687465935ILLevel 2No
Mar 31, 202687468474TXLevel 1No
Mar 30, 202687453668ILLevel 1No
Mar 30, 202687478682TXLevel 2No
Mar 30, 202687453616ILLevel 1No
Mar 28, 202687466541TXLevel 1No
Mar 28, 202687466407TXLevel 2No
Mar 28, 202687441653TXLevel 2No
Mar 28, 202687466741TXLevel 1No
Mar 26, 202687466531TXLevel 1No
Mar 26, 202687440732TXLevel 1No
Mar 26, 202687424076TXLevel 2No
Mar 26, 202687466625TXLevel 1No
Mar 25, 202687440813TXLevel 2No
Mar 25, 202687423619TXLevel 2No
Mar 25, 202687466177TXLevel 2No
Mar 25, 202687440926TXLevel 1No
Mar 25, 202687410609TXLevel 2No
Mar 25, 202687467345TXLevel 2No

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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