Yes, Montana permits underglow lighting on vehicles, but only under strict conditions outlined in state traffic regulations and local ordinances. The Montana Department of Transportation (MDT) aligns with federal standards, allowing non-flashing, non-vehicle-integrated lights that do not exceed white or amber hues. However, local jurisdictions such as Missoula and Bozeman may impose additional restrictions, necessitating compliance checks with municipal codes.
Key Regulations for Underglow Lighting in Montana
- Color Restrictions: Only white or amber underglow lighting is permissible; red, blue, or green hues are prohibited as they conflict with emergency vehicle signaling under Montana Code Annotated § 61-9-403.
- Placement and Visibility: Lights must not project beyond the vehicle’s width or height, and underglow cannot be visible from the front or sides to avoid confusion with turn signals or brake lights.
- Operation Limits: Underglow must remain non-flashing and stationary; dynamic or pulsating effects violate MDT Traffic Safety Regulations. Local ordinances in 2026 may further restrict commercial vehicles.
Violations may result in citations under reckless driving statutes or municipal noise/light ordinances. Motorists should verify county-specific rules, as enforcement varies between rural and urban areas. For legal certainty, consult the MDT Vehicle Services Bureau or local law enforcement prior to installation.