397.19(a) — Hazmat route restrictions
FMCSA violation code under Hazardous Materials. Severity weight: 7. Out-of-service eligible.
Violation Description
Operating a CMV transporting hazardous materials on a route that is restricted or prohibited.
About This Violation Code
Code 397.19(a) falls under the Hazardous Materials BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 7 (scale 1-10, higher = more severe). This violation is Out-of-Service eligible, meaning the driver or vehicle may be placed out of service at roadside when cited.
When this violation is cited during a roadside inspection, it contributes to the carrier's Hazardous Materials 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 397.19 in the Federal Motor Carrier Safety Regulations.