Traffic Signs for Idaho
Equip Idaho roads, lots, and work zones with MUTCD-compliant traffic signs. Start with the Idaho-specific accessible parking sign required here, then add the regulatory and warning signs every site needs.
Idaho-Specific Signs
Built to meet Idaho requirements.
Idaho Traffic Sign Requirements
Idaho adopts the National MUTCD (Manual on Uniform Traffic Control Devices) together with a state supplement, the Idaho supplementary guidance to the MUTCD. Signs installed on Idaho public roads must meet the national standard plus the state's specific modifications, enforced through the Idaho Department of Transportation.
MUTCD compliance
The MUTCD defines every standard regulatory (R), warning (W), and guide (G) sign — its exact size, legend, and colors. Our Idaho traffic signs are produced to those specifications so they are compliant out of the box, whether you need stop, yield, speed limit, or warning signs.
Reflectivity
Signs that face traffic must meet the FHWA minimum retroreflectivity levels in the MUTCD, and agencies are required to maintain them. We offer engineer-grade and high-intensity prismatic reflective sheeting to meet Idaho road and work-zone requirements.
Idaho Sign FAQs
- Do traffic signs in Idaho have to be MUTCD-compliant?
- Yes. Traffic signs on public roads in Idaho must conform to the MUTCD as adopted with the state supplement, which sets the required size, legend, color, and reflectivity for each sign. Our signs are made to that standard.
- Who regulates traffic signs in Idaho?
- The Idaho Department of Transportation sets and enforces traffic-sign standards in Idaho, following the MUTCD.
- Does Idaho modify the national MUTCD?
- Idaho adopts the National MUTCD together with a state supplement, the Idaho supplementary guidance to the MUTCD, so signs must meet both the national standard and the state's modifications.