Violation code

374.313B

Bus - Failure to maintain restroom

Not in SMSNon-OOS· FMCSA A&I All Violations

374.313B is a Other violation under 49 CFR §374.313B. It is not scored in the SMS. Nationally it was cited 21 times in the last five years, with an OOS rate of 0.0%.

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National roadside inspection stats

as of 6/20/2026

Inspections

that found this code

Violations

total written

OOS rate

0.0%

0 OOS

Source: FMCSA roadside inspection data (last 5 years). The OOS rate is the share of these violations that led the officer to mark the driver or vehicle out of service.

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Not used in SMS BASIC scoring

Recorded on your inspection report and visible on the PSP, but contributes 0 points to CSA BASIC scores — even if cited Out-of-Service.

Violation group: Other
Regulation §: 374.313B
Severity weight: N/A
Used in SMS: No
Status: Active
Updated: 6/20/2026

Last updated June 2026

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Challenging 374.313B through FMCSA DataQs

If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Codes not used in SMS scoring.

Common ways to challenge this code

Not used in SMS — should not affect BASIC
This code is on the inspection report but is excluded from SMS BASIC scoring per Appendix A. Use DataQs to correct the underlying data quality issue if the code was written in error, but understand it does not affect the CSA percentile.
Evidence that wins
- ✓FMCSA SMS Methodology Appendix A reference
- ✓Underlying inspection report

Common pitfalls — avoid these

⚠These codes still appear on PSP — challenge the data if the cite was wrong

⚡ Draft a challenge for 374.313B →Read the DataQs guide first

Other Other codes

Codes under the same FMCSA violation group

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Frequently asked questions about 374.313B

What does violation 374.313B mean?

374.313B is the FMCSA roadside-inspection violation code for "Bus - Failure to maintain restroom", part of the Other group, cited under 49 CFR §374.313B.

What BASIC does 374.313B affect?

374.313B is not scored in any CSA BASIC. It is recorded on the inspection report and appears on the PSP, but it contributes 0 points to a carrier's SMS BASIC percentiles.

Is 374.313B an out-of-service (OOS) violation?

No. 374.313B is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.

How many CSA points does 374.313B add?

374.313B adds 0 CSA points because it is not used in SMS scoring, even when written out of service.

Can 374.313B be challenged through DataQs?

Yes. If you believe 374.313B was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.

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