A guide to “angry eyes” rules every driver should know

1. Unauthorized front-facing lights

Illegal: green, blue, red, purple LEDs; RGB color-changing systems; strobe lights visible from the front.
Allowed: white or amber lights that comply with FMVSS 108.
The goal is to prevent confusion with emergency vehicles and reduce glare hazards.

2. LED bars and overly bright auxiliary lighting

Many states prohibit the use of LED light bars on public roads, high-intensity auxiliary lamps without proper regulation, and any device that flashes or produces lighting patterns. These systems often lead to stops for visibility and distraction risks.

3. Prohibited tinting and windshield obstructions

Common violations include excessively dark windshield tint, stickers or decals blocking critical viewing areas, interior LED strips on the windshield, and closed front curtains while driving. Any obstruction can result in immediate OOS orders.

4. Extreme suspension or height alterations

Banned modifications include oversized lift kits, ride heights that fall outside state-approved ranges, and bumpers positioned outside required impact zones. These alterations can increase crash severity and affect vehicle stability.

5. Covered or unreadable license plates

It is illegal to obscure a plate with tinted covers, frames that hide characters, or LED strips that alter readability. Several states are increasing enforcement of these violations.

6. Illegal exhaust systems

FMCSA rules prohibit open straight pipes without a muffler, exhaust systems that exceed state noise limits, and modified “train horn” devices producing extreme sound levels. These systems can affect emissions, disturb communities, and compromise safety.