When to use your car’s parking lights?

Our vehicle’s lights are a fundamental active safety component, the importance of which we often underestimate. Not only do they allow us to see in low-light conditions, but crucially, they make us visible to other road users. Especially during times like autumn and winter, when daylight hours decrease drastically, the correct use of the lighting system becomes vital. Properly managing car lights is not only a matter of avoiding financial penalties, but an essential measure to significantly reduce the risk of accidents. Below, we’ll explore in detail when and how to use each type of light on our vehicle, based on current regulations in Spain.

Position Lights: Visibility and Width

Position lights, both front and rear, serve a primary purpose: to indicate the presence and width of our vehicle. It’s important to understand that they’re not designed to illuminate the road itself, but rather to make our car visible to other drivers, especially in low-visibility situations. Think of them as a signal light that defines the outline of your vehicle in the dark or in adverse conditions.

When should we activate the parking lights? The regulations are clear on this matter. Their use is mandatory in the following cases:

• Between sunset and sunrise: During twilight and nighttime, sidelights are essential to signal our presence on the road.
• Weather or environmental conditions that significantly reduce visibility: Fog, heavy rain, snow, smoke, or suspended dust reduce visibility and make position lights crucial for being seen.
• Driving through tunnels or underpasses: Even during the day, when entering a tunnel or underpass, the brightness decreases, making it necessary to use the parking lights.

It’s important to note that the rear parking lights turn on automatically whenever other lights are activated, such as the high beam, low beam, front parking lights, rear license plate light, or fog lights. The front parking lights, on the other hand, must always be on whenever the low beam, high beam, or front fog lights are activated. This interconnection ensures that, when using any primary lighting system, the parking lights are also working, maximizing our visibility.

Daytime Running Lights (DRL): Being Seen During the Day

Since 2011, most new vehicles registered in Europe have been equipped with daytime running lights (DRLs). These lights represent a significant advance in road safety, as they are specifically designed to improve vehicle detection during daylight hours. Their primary purpose is not to illuminate the road, but rather to increase our visibility to other road users during the day.

One of the great advantages of daytime running lights is their automatic operation. They activate as soon as we start the vehicle and turn off when we stop the engine. This eliminates the possibility of forgetting to turn them on and ensures that our car is always visible during the day, without the need for any intervention on our part.

For older vehicles that don’t have factory-installed daytime running lights, the Directorate General of Traffic (DGT) offers an important recommendation: turn on the low-beam headlights during the day, especially when driving on the highway and especially during the fall and winter months. This practice, while not mandatory in all cases for vehicles without DRLs, significantly increases safety by making the vehicle more visible.

Low Beam Headlights: Illuminating the Road Properly

Low beam headlights, also known as dipped beam or low beam, are an essential lighting system whose primary purpose is to improve our visibility on the road. They are designed to effectively illuminate the road without dazzling other drivers traveling in the opposite direction or ahead of us.

The use of low-beam headlights is mandatory in a wide variety of situations. We must have them on:

• Between dusk and sunrise: On sufficiently illuminated urban and interurban roads, dipped headlights are mandatory at night.
• At any time of day in tunnels, underpasses and sections affected by the “Tunnel” (S-5) sign that are sufficiently illuminated: Even during the day, if we are driving through tunnels or sections marked as such, we must use dipped headlights.
• In towns and cities, when the road is poorly lit: In urban areas, if street lighting is poor, dipped headlights are mandatory.

The regulations define a road with insufficient lighting precisely: “a road where, with normal vision, at any point on the carriageway, the license plate cannot be read from 10 meters away or a dark-painted vehicle cannot be seen from 50 meters away.” This definition gives us a clear reference for determining whether we should turn on our dipped headlights in urban areas.

In addition, there are other specific situations on interurban roads and poorly lit tunnels where the use of dipped headlights is also mandatory:

• Between dusk and sunrise on poorly lit intercity roads.
• At any time of day for sections affected by the “Tunnel” sign that are insufficiently lit.

In these cases, the use of dipped headlights is mandatory when any of the following circumstances apply:

• That the vehicle lacks high-beam lighting (high beam headlights).
• Proceed at speeds of up to 40 km/h without using high beams.
• That there is a possibility of causing glare to other users.

High Beam: Maximum Illumination with Caution

High-beam headlights, also known as long or high beam headlights, provide the maximum possible illumination of the road. Their light output is significantly greater than that of low-beam headlights, allowing us to see further. However, due to this intensity, their use must be extremely careful to avoid dazzling other drivers.

When can we use high-beam headlights? The regulations state that their use is permitted:

• When, without risk of causing glare, you travel at more than 40 km/h.
• Between dusk and sunrise, outside of town, on poorly lit roads.
• At any time of day on sections of road marked as “Tunnel” that are insufficiently lit.

It is crucial to emphasize the “no risk of causing glare” requirement. Improper use of high-beam headlights can be very dangerous and is punishable. Furthermore, their use is expressly prohibited in the following situations:

• When the vehicle is stopped or parked: We should not use the high beams if our car is stopped.
• Flashing headlights to warn oncoming drivers of a police checkpoint: Although popular belief may suggest otherwise, using your headlights for this purpose is illegal.

A fundamental aspect of using high beam headlights is knowing when to switch from low beam to low beam. The general rule is to switch to low beam immediately when there is a risk of dazzling other road users. This includes:

• Vehicles traveling in the opposite direction: When approaching another vehicle head-on, we must switch to low beam to avoid dazzling the driver.
• Vehicles traveling in the same direction: If we approach another vehicle from behind, we must also switch to low beam to avoid dazzling the driver through their rearview mirror.

Fog Lights: Visibility in Adverse Conditions

Fog lights are a supplemental lighting system specifically designed to improve visibility in adverse weather conditions that significantly reduce visibility. There are front and rear fog lights, each with a specific function and use.

All passenger cars are required to be equipped with rear fog lights, while front fog lights are optional. The sole purpose of rear fog lights is to make our vehicle more visible from behind in low-visibility conditions. Their use is restricted to particularly adverse weather or environmental conditions, such as:

• Thick fog.
• Very heavy rain.
• Heavy snowfall.
• Dense clouds of dust or smoke.

It’s important to note that the use of rear fog lights is limited to these extreme conditions. Using them in normal visibility or even in light rain can be distracting to other drivers and even result in a fine.

Front fog lights, on the other hand, aim to increase illumination of the road ahead of the vehicle in the same adverse weather conditions. They offer a wider and lower beam than low-beam headlights, which helps illuminate the road directly in front of the vehicle and reduce glare caused by light reflection in fog or rain.

Front fog lights can be used in a variety of ways:

• In isolation: In dense fog conditions, it is sometimes advisable to use only the front fog lights to avoid the “white wall” effect that can be caused by low beams reflecting off the fog.
• Simultaneously with low beam: This is the most common combination and is usually the most effective in most low visibility conditions.
• Simultaneously with high beams: Although less common, in certain situations of less dense fog or on very dark and winding roads, the front fog lights can be used together with the high beams.

There is also one exception where the use of front fog lights is permitted even in adverse weather conditions: on narrow road sections (6.5 meters wide or less) with many curves. In these situations, front fog lights can improve visibility on curves and make driving safer.

Penalties for Incorrect Use of Lights

Traffic regulations are clear and strict regarding the use of lighting. Driving without lighting in situations of poor or reduced visibility is considered a serious offense. Likewise, dazzling other road users is also considered a serious infraction. Both behaviors can result in fines of up to 200 euros.

In Summary: Safety and Responsibility at the Wheel

Using our vehicle’s lights correctly is a fundamental responsibility to ensure our safety and that of other road users. Knowing when and how to use each type of light, from sidelights to fog lights, is essential for safe driving and avoiding fines. Remember that lights are not just for seeing, but also, and perhaps more importantly, for being seen. Adapt your lighting use to visibility conditions and road type, and always drive responsibly.