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If you have automatic headlights, chances are they begin to click on as soon as the sun starts to set. Without automatic headlights, you probably wait as the streets begin to dim and then switch them on to alert other drivers of your presence. But do you know when your headlights must be turned on?
Headlight laws vary depending on weather conditions, the type of roadway, and specific state laws. However, it’s general practice that your headlights must be in use from sunset to sunrise, and taillights must operate in conjunction with headlights.
When atmospheric conditions limit visibility, fog lights or low beams should be used with headlights and taillights. High beams should be avoided in inclement weather, and they must be dimmed when approaching other motor vehicles. Additionally, hazard lights should only be used to alert other drivers of danger.
For a detailed breakdown of when you must use headlights and what headlight courtesy is for drivers sharing the road, check out these headlight laws for all 50 states.
Don’t let the sun being out the trick you into thinking you don’t need your headlights on. There are several reasons why daytime headlight use isn’t just recommended, but required by certain state laws. Depending on where you’re driving, you can receive a pricey ticket for failing to use your headlights.
For one, inclement weather conditions, such as snow, sleet, rain, hail, or fog, always require daytime headlight use. Some states even require mandatory headlight usage if your windshield wipers are on. Be sure to check your state’s headlight laws below to see if this applies in your area.
Secondly, you may be required to use daytime headlights on sections of road that have limited visibility—such as mountain roads, country roads, or narrow, two-lane highways. In these instances, daytime headlights help make your car visible to oncoming vehicles, and they can help prevent a car accident. Areas that require the daytime use of headlights are typically marked with “Daylight Headlights Section” signage.
Though not legally required in the U.S., many new automobiles are now equipped with Daytime Running Lights (DRLs). Daytime Running Lights are automatic, low-beam headlights that emit a dull white, yellow, or amber light. Unlike automatic headlights that only turn on when the road ahead is dim, DRLs switch on as soon as the car is turned on, no matter the visibility conditions.
Daytime Running Lights are not meant to help you see the road. Rather, their purpose is to help oncoming traffic see you. Many newer vehicles include DRLs as a precautionary measure to help reduce the risk of collision. While countries in the European Union and Canada require DRLs on all new vehicles, the inclusion of DRLs in the U.S. is considered a beneficiary safety measure and is not mandatory.
A general rule of thumb across all 50 states is that headlights must be turned on a half-hour after sunset until a half-hour before sunrise. Essentially, whenever the sun is not shining, you need your headlights on. In Arizona, you’re also required to use your headlights during inclement weather, like when it’s snowing or icy. Failure to do so is dangerous driving behavior and can result in a hefty fine or worse—a car accident.
Similarly, the majority of states require high beams to be dimmed whenever an oncoming vehicle is within 500 feet or when following within 200 to 300 feet of another vehicle. Though it’s not the law in all 50 states, taking care not to momentarily blind an approaching vehicle with your high beams is common courtesy while driving.
Each state has its own unique set of headlight laws that govern when and how you should use them. To be sure you’re compliant with your state’s laws, check out this list of headlight laws for all 50 states.
Headlights are required when windshield wipers are in use or when visibility is less than 500 feet ahead.
Headlights are required when visibility is less than 1000 feet ahead or when speed exceeds 45 mph on designated highways. Hazard lights may only be used when your car is disabled.
Arizona state law requires headlights when visibility is less than 500 feet ahead or whenever there is snow or ice. High beams should not be used in fog or inclement weather. Hazards may only be used if your vehicle is stopped on the roadway or shoulder.
Headlights are required when windshield wipers are in use or visibility is less than 500 feet ahead. High beams cannot be used in inclement weather conditions, though fog lights and low beams are encouraged. Hazard lights should only be used to signal caution for other drivers.
Laws for headlight use and hazard lights in California are a bit different. Headlights are required when driving through mountain roads when windshield wipers are in use, or if visibility is less than 1000 feet ahead. Hazard lights are permitted to signal caution to other drivers or for a funeral procession.
Headlights are required when visibility is less than 1000 feet ahead. High beams should not be used in fog, though fog lights and low beams are recommended.Connecticut Headlight Specifications
Headlights must be mounted between 22 inches and 54 inches from the ground and be white or amber in color. Headlights are required during inclement weather or when visibility is less than 500 feet ahead.
Headlamps must be mounted between 22 inches and 54 inches from the ground and be white in color. Headlights are required when wipers are in use or when visibility is less than 1000 feet ahead. Hazard lights are only allowed to signal caution to other drivers.
Headlights are required when wipers are in use or when visibility is less than 500 feet ahead. High beams are not permitted on city streets and should only be used on country roads with no street lights.
Headlights are required during inclement weather conditions. Low beams are most effective when traveling up to 25 mph, while high beams are expected while traveling above 25 mph. Hazards may only be used when your vehicle is stopped on the shoulder or disabled on the roadway.
Georgia state law requires headlights during inclement weather conditions or when visibility is less than 500 feet ahead. High beams are only permitted on rural roads. They are not permitted when visibility is less than 200 feet ahead or when driving in fog, rain, snow, or smoke. In these cases, it’s best to use low beams or fog lights.
Headlights are required when visibility is less than 500 feet ahead or during inclement weather conditions. Hazard lights are forbidden to use while moving.
Headlamps are required when visibility is less than 500 feet ahead. Hazard lights are only permitted to indicate a traffic hazard.
Illinois requires headlights when windshield wipers are in use. The state also recommends the use of headlamps during fog, in addition to fog lights. Hazards should only be used to alert other drivers to a disabled or parked vehicle.
Headlights are required when visibility is less than 500 feet ahead. Hazard lights are only permitted to indicate a disabled vehicle or an emergency.
Headlights are required when visibility is less than 500 feet ahead. Hazard lights are only permissible when alerting other drivers to a disabled or parked vehicle.
Headlamps are required when visibility is less than 1000 feet ahead, when windshield wipers are in use, or when driving through fog or smoke. Hazard lights may only be used to indicate a parked or disabled vehicle.
Kentucky state law mandates that headlights must only be white or amber in color and are required whenever visibility is low. Hazard lights are prohibited unless they’re used to warn drivers about upcoming dangerous driving conditions.
Headlights are required when wipers are in use and when visibility is less than 500 feet ahead. Hazard lights are only permitted to indicate a disabled vehicle along the road.
Headlamps are required when visibility is less than 1000 feet ahead or if wipers are in use. Hazard lights are only permitted to indicate a driving hazard.
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Maryland requires headlights when wipers are in use or visibility is less than 1000 feet ahead. Hazard lights may only be used in emergency situations.
Headlights are required when visibility is less than 500 feet ahead if windshield wipers are turned on, or when driving through a tunnel. Hazard lights are required if the vehicle is disabled.
Headlight use laws in Michigan require the use of headlamps in inclement weather conditions or when visibility is less than 500 feet ahead. Hazard lights are only permitted to indicate a driver is approaching dangerous driving conditions.
Headlamps are required when visibility is less than 500 feet ahead, or when conditions such as snow, rain, sleet, or fog are present. High beams should be used whenever possible but you must dim them when driving behind a commercial vehicle at night. Hazard lights are permitted to warn other motorists of a funeral procession or to indicate if your vehicle has become disabled while driving.
Headlights are required when visibility is less than 500 feet ahead. Hazard lights may only be used to indicate a disabled vehicle pulled to the side of the road.
Missouri requires headlights when visibility is less than 500 feet ahead, if windshield wipers are in use, or if the fog is present.
Headlights are required during inclement weather conditions or when visibility is less than 500 feet ahead. Hazard lights may only be used to indicate a driver is approaching dangerous driving conditions.
Headlamps are required when visibility is less than 500 feet ahead. Hazard lights must be used when a vehicle is parked on the freeway.
Headlights are required when visibility is less than 1000 feet ahead or when inclement weather creates insufficient light. You must also use your headlights if an official traffic control device, such as a sign or light, directs it. Hazard lights may only be used to indicate a disabled vehicle.
New Hampshire requires drivers to use headlights during inclement weather conditions or when visibility is less than 1000 feet ahead.
Headlights are required whenever windshield wipers are in use, if adverse weather conditions are present, or when visibility is less than 500 feet ahead.
Headlamps are required when visibility is less than 500 feet ahead. Hazard lights should only be used if your vehicle is disabled on the highway.
Headlights are required when visibility is less than 1000 feet ahead, if inclement weather is present, or when windshield wipers are in use.
Drivers are required to use headlights in North Carolina when windshield wipers are in use or when visibility is less than 400 feet ahead.
Headlights are required during inclement weather conditions, including fog, or when visibility is less than 1000 feet ahead.
Headlamps are required when windshield wipers are in use or if visibility is less than 1000 feet ahead. Hazard lights may only be used to indicate a driver is approaching
dangerous driving conditions.
Headlights are required when visibility is less than 1000 feet ahead and during inclement weather conditions, including fog, sleet, and hail. Hazard lights are permissible
when alerting other drivers to dangerous driving conditions or during an emergency.
In Oregon, headlights are required when visibility is less than 1000 feet ahead.
Headlights are required when windshield wipers are in use or when visibility is less than 1000 feet ahead. You must also turn on your headlights when driving through construction zones. Hazard lights must be turned on if a vehicle is disabled or is traveling less than 25 mph outside of residential or business districts.
Headlights are required when wipers are in use and visibility is less than 500 feet ahead. High beams are not permitted in adverse weather conditions, including rain, snow, sleet, and fog.
Headlamps are required when visibility is less than 200 feet ahead or whenever wipers are in use.
Headlights are required when visibility is less than 200 feet ahead. High beams are required to be dimmed when you pass or overtake a vehicle from behind or when an oncoming vehicle approaches.
Headlights are required when wipers are in use when visibility is less than 200 feet ahead, or if adverse conditions, such as fog or smoke, create insufficient light. Hazard lights are only permitted in the case of an emergency.
Texas requires drivers to use headlights when visibility is less than 1000 feet ahead. High beams may not be used on lighted roads or while driving through heavy rain, sleet, snow, fog, or dust.
Headlights are required when visibility is less than 1000 feet ahead or if adverse weather conditions, such as dust, fog, or heavy rain, create insufficient light.
Headlamps are required when visibility is less than 500 feet ahead or during inclement weather conditions. High beams are not allowed on roads with street lights, and you should not use them while driving through fog.
Headlights are required when visibility is less than 500 feet ahead and during adverse weather, such as fog or sleet. You cannot use your high beams when driving through cities or towns unless the road you’re driving has no street lights in place. Hazard lights should be used if you’re traveling less than 30 mph or to indicate dangerous driving conditions.
Washington requires headlights when visibility is less than 1000 feet ahead. High beams should not be used in heavy rain, snow, or fog. Hazard lights should only be used if your vehicle is disabled on the highway.
Headlamps are required when visibility is less than 500 feet ahead or during inclement weather, such as snow, sleet, rain, and fog. High beams are not allowed on city and town streets unless the road has no lighting. Hazard lights are only permissible when a vehicle is disabled or during an emergency.
Headlights are required when visibility is less than 500 feet ahead. You must also turn on your headlights when traveling roads with limited visibility, such as through mountain roads, country roads, or two-lane highways. High beams should not be used during foggy or snowy conditions.
Headlights are required when visibility is less than 1000 feet ahead or during adverse weather conditions that limit available light. High beams should only be used on rural highways or country roads. Hazard lights should be in use if your vehicle is disabled on the highway.
A half-hour after the sun sets, it’s time to turn on your headlights. Be sure to use your headlights all through the night until a half-hour before the sun rises. But if snow or hail starts to fall, you should turn on your headlights then, too. By understanding when your headlights are mandatory—in the state of Arizona or otherwise—you can stay compliant with state law and save yourself from a traffic ticket.
