# When to Use Hazard Lights Correctly

> Hazard lights warn of stopped vehicles but confuse drivers when on while moving.
- Title: When to Use Hazard Lights Correctly · Family Handyman
- Summary: Hazard lights warn of stopped vehicles but confuse drivers when on while moving. Hazard lights should only be used when a vehicle is disabled or in extreme…
- Keywords: hazard lights, driving safety, extreme weather, aaa, national weather service, national highway traffic safety administ, accuweather, Use, Hazard, Lights, Correctly, Family Handyman
- Source: Family Handyman — https://familyhandyman.com/article/hazard-lights-driving
- Author: Alex Shoemaker
- Published: 2026-10-08T20:19:59+00:00
- Read time: 1 min
- Topics: hazard lights, driving safety, extreme weather, aaa, national weather service, national highway traffic safety administ, accuweather
## Hazard Light Laws Vary by State
Hazard lights rules differ by state, so drivers should check local guidelines before using them while driving.

> AAA notes that hazard-light laws vary by state, so drivers shouldn’t assume the same rules apply everywhere.
## When to Use Hazard Lights
Turn on hazard lights after a breakdown, flat tire, or crash if your vehicle must stay near traffic.

> After a breakdown, flat tire, or similar problem, the driver should move as far from traffic as safely possible and turn on the flashers.
## When Not to Use Hazard Lights
Hazard lights confuse drivers when on while moving; use headlights instead during heavy rain or poor visibility.

> Do not drive with your hazard lights on. Hazard lights are meant to signify that your vehicle is disabled.
## Extreme Weather Guidance
In dense fog with near-zero visibility, turn on hazard lights then pull into a safe location.

> In extremely dense fog where visibility is near zero, the best course of action is to first turn on your hazard lights, then simply pull into a safe location such as a parking lot of a local business and stop.
## Pre-Travel Weather Checks
Check local weather and road conditions before heading out to avoid dangerous travel.

> Check your local weather and traffic reports before heading out. If your roads are not in good shape, consider postponing non-essential travel.
## Why Hazard Lights Cause Confusion
Hazard lights reduce visibility and make it hard to see if drivers are braking.

> Hazard lights can actually reduce visibility making other drivers think you are stopped or stalled.
## Key takeaway

Hazard lights should only be used when a vehicle is disabled or in extreme weather with zero visibility, not while driving to avoid confusion.