United States
Alabama
The use of hazard lights is permitted while driving unless otherwise posted.
Alaska
The use of hazard lights is not permitted while driving.
Arizona
Hazard light use is not permitted while driving except in an emergency situation.
Arkansas
Hazard light usage is not permitted while driving except to indicate a traffic hazard.
California
Hazard light use is not permitted while driving except to indicate a traffic hazard.
Colorado
Hazard light use is not permitted while driving except if the vehicle speed is 25 mph or less.
Connecticut
Hazard light use is permitted while driving unless otherwise posted.
Delaware
Hazard light use is not permitted while driving except to indicate a traffic hazard.
District of Columbia
Hazard light use is permitted while driving.
Florida
The use of hazard lights is not permitted while driving.
Georgia
The use of hazard lights is permitted while driving.
Hawaii
Hazard light use is not permitted while driving.
Idaho
Hazard light use is not permitted while driving except to indicate the presence of a vehicular traffic hazard requiring unusual care in approaching, overtaking or passing.
Illinois
The use of hazard lights is not permitted while driving.
Indiana
Hazard light use is not permitted while driving except in emergency situations.
Iowa
The use of hazard lights are not permitted while driving except to indicate a traffic hazard.
Kansas
Hazard light use is not permitted while driving.
Kentucky
Hazard light use is permitted while driving.
Louisiana
Hazard light use is not permitted while driving.
Maryland
Hazard light use is not permitted while driving except in emergency situations.
Massachusetts
Hazard light use is not permitted while driving.
Michigan
Hazard light use is permitted while driving.
Minnesota
Hazard lights are not permitted while driving except to indicate a traffic hazard.
Mississippi
Hazard light usage is permitted while driving.
Missouri
Hazard light usage is permitted while driving.
Maine
Hazard light use is not permitted while driving unless to indicate a traffic hazard.
Montana
Hazard lights are not permitted while driving except to indicate a traffic hazard.
Nebraska
Hazard light use is permitted while driving.
Nevada
Hazard light usage is not permitted while driving.
New Hampshire
Hazard light use is permitted while driving.
New Jersey
The use of hazard lights is not permitted while driving.
New Mexico
Hazard light use is not permitted while driving.
New York
Hazard light use is permitted while driving unless otherwise posted.
North Carolina
Hazard light use is permitted while driving unless otherwise posted.
North Dakota
Hazard light use is permitted while driving unless otherwise posted.
Ohio
Hazard light use is not permitted while driving except when a hazardous condition is present.
Oklahoma
Hazard light use is not permitted while driving except in emergency situations and to indicate a traffic hazard.
Oregon
Hazard light use is permitted while driving unless otherwise posted.
Pennsylvania
Hazard light use is permitted while driving.
Rhode Island
Hazard light use is not permitted while driving.
South Carolina
Hazard lights may be used while driving for the purpose of warning the operators of other vehicles of the presence of a vehicular traffic hazard requiring the exercise of unusual care in approaching, overtaking or passing.
South Dakota
Hazard light use is permitted while driving.
Tennessee
Hazard light use is not permitted while driving except in emergency situations.
Texas
Hazard light use is permitted while driving.
Utah
Hazard light use is permitted while driving.
Vermont
Hazard light use is permitted while driving.
Virginia
Hazard light use is not permitted while driving except for emergency vehicles, stopped or slowed vehicles to indicate a traffic hazard, when traveling as part of a funeral procession, or traveling slower than 30 mph.
Washington
Hazard light use is not permitted while driving except to indicate a traffic hazard.
West Virginia
Hazard lights are not permitted while driving except in emergency situations.
Wisconsin
Hazard lights are not permitted while driving except to indicate a traffic hazard or when a hazardous condition is present.
Wyoming
Hazard light use is permitted while driving.
Puerto Rico
Hazard light use is not permitted while driving.
Canada
Alberta
The use of hazard lights is required by passenger vehicles that are stationary on a highway outside of an urban area at night or when the vehicle is not visible from 150 meters distance.
British Columbia
Hazard lights may be used when operating a slow-moving vehicle or when a vehicle is disabled on the highway.
Manitoba
Hazard lights may be used when a motor vehicle is coming to a stop or standing on a highway or traveling at a speed less than 40 kph when it is necessary to do so for safe operation; and when the vehicle is again put in motion or resumes a speed up to 40 kph.
New Brunswick
Hazard lights are permitted only when a vehicle is parked on the highway or any portion thereof due to an emergency or under circumstances beyond the control of the driver.
Newfoundland and Labrador
Hazard light use is permitted while driving.
Northwest Territories
Hazard lights must be used when a vehicle is parked on a roadway under during the period from 1 hour after sunset to1 hour before sunrise or at any other time when conditions of poor visibility exist. A vehicle that is travelling at less than 40 km/h, owing to vehicle impairment, must have its hazard lights activated.
Nova Scotia
Hazard light use is permitted while driving.
Nunavut
Hazard lights are required to be activated when a driver parks a vehicle on a roadway during the period from 1/2 hour after sunset to 1/2 hour before sunrise or at any other time when conditions of poor visibility exist; or when the vehicle is travelling at less than 40 km/h due to vehicle impairment.
Ontario
There are no restrictions on hazard light use.
Prince Edward Island
Hazard lights may not be used on a highway when a vehicle is moving.
Quebec
Hazard light use is permitted only for safety reasons.
Saskatchewan
Hazard lights may not be used unless a vehicle is coming to a stop or is standing on a highway, it is necessary to do so for the safe operation of the vehicle, or the vehicle presents a hazard to other vehicles on the highway.
Yukon
Hazard light use is permitted while driving to indicate a hazard.