Medical (Certificate) - Operating a CDL (passenger or property carrying) vehicle that is non-excepted and the driver has self-certified as excepted interstate or excepted intrastate with the state driver's licensing agency.
Driver Fitness2Non-OOS· SMS Appendix A v3.20
391.11(b)(4) is a Physical violation under 49 CFR §391.11(b)(4). It falls in the Driver Fitness BASIC with a severity weight of 2/10. Nationally it was cited 16,916 times in the last five years, with an OOS rate of 92.8%.
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National roadside inspection stats
as of 6/20/2026
Inspections
16,871
that found this code
Violations
16,916
total written
OOS rate
92.8%
15,697 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.
Violation group
Physical
Regulation §
391.11(b)(4)
Severity weight
2
Used in SMS
Yes
Status
Active
Updated
6/20/2026
Last updated June 2026
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391.11(b)(4) is the FMCSA roadside-inspection violation code for "Medical (Certificate) - Operating a CDL (passenger or property carrying) vehicle that is non-excepted and the driver has self-certified as excepted interstate or excepted intrastate with the state driver's licensing agency.", part of the Physical group, cited under 49 CFR §391.11(b)(4).
What BASIC does 391.11(b)(4) affect?
391.11(b)(4) falls under the Driver Fitness BASIC in the FMCSA Safety Measurement System (SMS).
What is the CSA severity weight of 391.11(b)(4)?
391.11(b)(4) carries a severity weight of 2 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Driver Fitness score.
Is 391.11(b)(4) an out-of-service (OOS) violation?
No. 391.11(b)(4) 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 391.11(b)(4) add to a carrier's score?
The point contribution of 391.11(b)(4) depends on its severity weight (2/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.
Can 391.11(b)(4) be challenged through DataQs?
Yes. If you believe 391.11(b)(4) 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.