Hazardous Material Route
- Shape
- Square
- Color
- Green circle with black HM
- Meaning
- A route designated for vehicles carrying hazardous materials.
- Required driver action
- Placarded vehicles should use this route.
- CDL relevance
- H/X endorsement drivers must follow designated hazmat routes.
Source: FHWA — Manual on Uniform Traffic Control Devices (MUTCD) (11th Edition (December 2023)). Sign images are original simplified illustrations for study, not official MUTCD artwork.