No, Massachusetts does not explicitly prohibit driving with interior lights on, but the state’s vehicle equipment laws under 540 CMR 21.00 and 720 CMR 9.06 require that lighting systems do not impair visibility or distract other drivers. The Registry of Motor Vehicles (RMV) interprets this to mean interior lights must not create glare or obstruct the driver’s view, aligning with federal NHTSA standards. Local police departments, including the Boston Police Department’s Traffic Division, may issue citations under “improper equipment” or “unsafe operation” if lights are deemed hazardous.
Key Regulations for Driving With Interior Lights On in Massachusetts
- 540 CMR 21.00 (Equipment Standards): Interior lights must not interfere with the driver’s ability to control the vehicle or impair the visibility of other road users. Excessive brightness or misdirected illumination may violate this rule.
- 720 CMR 9.06 (Unsafe Operation): Operating a vehicle with interior lights that create glare or distraction constitutes an unsafe act, potentially leading to citations under this regulation.
- Local Enforcement Discretion: Municipalities like Cambridge and Somerville may enforce stricter interpretations, particularly in high-traffic zones or during nighttime hours, as part of their Vision Zero initiatives.
The Massachusetts Department of Transportation (MassDOT) has not issued formal guidance on interior lighting, deferring to RMV and local authorities for enforcement. While no statute explicitly bans interior lights, drivers should exercise caution to avoid citations or accidents. Failure to comply may result in fines up to $100 under equipment violations, per RMV guidelines.