Driving a car in conditions of poor visibility or in the dark requires the driver not only increased attention, but also a clear understanding of the rules for using lighting devices. Errors in choosing the operating mode of headlights can cost not only a fine, but also life, since light is the main language of communication between road users. Many car enthusiasts are still confused about the nuances of turning on low beam, high beam, fog lights and side lights, which often leads to emergency situations.
Modern cars are equipped with complex lighting systems, including automatic sensors, which do not always respond correctly to changes in weather conditions. For example, the system may not turn on the lights in thick fog or twilight, relying on readings from light sensors that are “fooled” by reflected light. That is why the driver is obliged to independently control the operation of the optics and know what lighting devices must be activated in a specific traffic situation in accordance with the Road Traffic Regulations.
In this article, we will analyze in detail the scenarios for using various lighting modes, analyze typical mistakes and consider the legal consequences of ignoring them. Understanding these rules is necessary for everyone who gets behind the wheel, regardless of driving experience. We will also touch on the technical aspects of the operation of the optics and how to check its serviceability before leaving.
Basic requirements for the use of light according to traffic regulations
Traffic rules clearly regulate when and which lights should be on on a vehicle. According to basic standards, in the dark and in conditions of poor visibility, regardless of lighting, as well as in tunnels, headlights must be turned on on a moving vehicle low or high beam. This is a fundamental rule, violation of which is one of the most common causes of fatal accidents.
During the daytime, requirements also exist: all vehicles must have low beam headlights or daytime running lights. If the design of the car does not provide for the presence of DRL (Daytime Running Lights), the driver must turn on the low beam forcibly. Ignoring this requirement makes the car less noticeable on the road, especially in cloudy weather or against the backdrop of bright asphalt.
It is important to understand the differences between the modes of operation of optics. Low beam designed to illuminate the road ahead of the car at a distance of up to 30-40 meters and does not blind oncoming drivers. High beam illuminates the path at a distance of 100-150 meters, but its use is strictly limited in populated areas and in the presence of oncoming traffic. Switching between these modes incorrectly poses a direct safety risk.
Always check that all light bulbs are working properly before a long trip. The presence of one burnt-out low-beam headlight at night may lead to a ban on further operation of the vehicle by traffic police officers.
Driver actions in case of insufficient visibility
Insufficient visibility is a condition when the driver cannot distinguish by eye at any time of the day the boundaries of the roadway or objects located on it at a distance of less than 300 meters. In such conditions, be it fog, rain, snow or smoke, the rules dictate the inclusion of low or high beam headlights. However, the choice of a specific mode depends on the density of the medium.
In dense fog or heavy snow, use high beams strictly prohibited. The light beam is reflected from the smallest drops of water or snowflakes, creating a dense white wall in front of the driver, which completely eliminates visibility. In such a situation, you need to switch to low beam and be sure to turn on fog lights (PTF), if they are provided for by the design.
⚠️ Attention: The use of rear fog lights is only permitted in conditions of poor visibility. Turning them on in clear weather or during normal rain is a violation and can disorient drivers behind due to the excessive brightness of the red lights.
If visibility drops critically and you cannot continue driving safely, the Rules require you to stop. When stopping on the roadway or on the side of the road in the dark or in poor visibility conditions, you must turn on side lights. In case of a forced stop in places where it may be dangerous, the hazard warning lights are additionally activated.
The main rule of fog: low beam + front PTF. High beams in fog blind the driver himself, reflecting from the water suspension.
Features of traffic in populated areas and outside the city
Scenarios for using lighting devices differ radically depending on the type of road. In populated areas where, as a rule, there is artificial street lighting, the use of high beams is permitted only if there are no oncoming vehicles at a sufficient distance. However, in practice, in cities, low beams are sufficient to provide the necessary visibility without the risk of dazzling pedestrians and other drivers.
Outside the city, on unlit sections of highways, the driver is required to switch to high beams in order to timely detect obstacles, animals or road defects. But here the rule of politeness and safety comes into force: when an oncoming car approaches at a distance of less than 150 meters, as well as at a greater distance, if the headlights of the oncoming vehicle cause discomfort to the driver, it is necessary switch to low beam.
Also, the high beam must be switched to low beam mode if you are moving behind another car in the same lane. The light from your headlights, reflected in the rearview mirrors of the car in front, can blind that driver. This rule also applies to cases of towing, when the headlights of the towed vehicle may interfere with the driver of the towing vehicle.
☑️ Checking the lights before a night trip
Towing and use of lights
Towing a vehicle is a complex maneuver that requires coordination between both drivers and proper warning lights. According to traffic regulations, the towing vehicle must have the low beam headlights. This makes the hitch and the towing process more visible to other road users.
On a towed vehicle, if it is a power-driven vehicle, in the dark or in conditions of poor visibility, the side lights. Turning on low or high beam headlights on a towed vehicle is not required and is not even advisable, so as not to create a false impression about the number of lanes or maneuvers. However, if towing is part load, the rules may vary depending on which wheels are on the road.
It is important to remember the emergency stop signal. When towing with a flexible or rigid hitch in a populated area, as well as when driving on roads where this is required, the towed vehicle may have an hazard warning light on to attract attention, although traffic regulations do not directly require keeping it on all the time if the lights are on. However, practice shows that flashing orange lights significantly improve process safety.
⚠️ Attention: When towing at night, make sure that the license plate of the towed vehicle is illuminated. If the standard license plate lighting does not work due to lack of power from its battery, you must use an additional light source, otherwise you will be fined.
Technical faults and prohibiting factors
Operating a vehicle with faulty lights is prohibited. There is a list of faults in which movement is completely prohibited, as well as those that allow you to get to the repair site or parking lot with precautions. Critical faults that you cannot drive with include:
- 🚫 Absence or inoperability of low beam headlights in the dark or with insufficient visibility.
- 🚫 Not working tail lights in the dark.
- 🚫 Malfunction of brake lights (brake lights).
- 🚫 Absence or contamination of headlight lenses, as well as installation of lighting devices not provided for by the design.
Particular attention should be paid to adjusting the light. Even if the lamps are lit, but the beam of light is directed incorrectly (too high or to the side), this is a violation. A light that is too high blinds oncoming drivers, and a low light does not illuminate the road. The adjustment should be made on special stands, but in the field you can use the projection method on the wall, observing the angles of inclination specified in the instructions for the car.
Replacing lamps also requires care. Do not touch the glass bulb of a halogen lamp with bare hands, as traces of grease lead to local overheating of the glass and rapid failure of the lamp. Use gloves or a clean cloth. For xenon and LED lamps, it is important to maintain polarity and compatibility with control units to avoid errors in the on-board system.
Why is the lamp indicator on the panel blinking?
Frequent flashing of the turn signal on the dashboard (2 times more often than usual) indicates that one of the lamps in the turn circuit has burned out. This is done so that the driver notices the malfunction even without a visual inspection of the car.
Table: Light modes in various situations
To quickly navigate the rules, it is convenient to use a pivot table. It will help you remember which devices to turn on depending on the time of day, weather conditions and location.
| Situation | Required devices | Prohibited |
|---|---|---|
| Night, locality | Low beam | High beam (if there is no lighting) |
| Night, highway (no oncoming traffic) | High beam | Fog lights without low beam |
| Thick fog | Low beam + PTF (front) | High beam |
| Towing (towing) | Low beam | High beam |
| Roadside stop (night) | Side lights | Low/high beam headlights |
Compliance with these simple but vital rules creates a driving culture and reduces the risk of accidents. Remember that lighting devices are not just an element of comfort, but a basic safety tool. Check their condition regularly, keep the lampshades clean and do not neglect the rules for switching modes.
Clean headlight lenses increase lighting efficiency by up to 30%. Regular cleaning of your optics is not about aesthetics, but a necessity for your safety.
Do I need to turn on the lights during the day if there are DRLs?
Yes, if your car is designed with daytime running lights (DRL), then you do not need to turn on the low beam separately during the day. The DRLs automatically light up when the engine is started. However, if the DRLs are missing or faulty, you are required to turn on low beam headlights during daylight hours according to traffic regulations.
Is it possible to use “fog lights” instead of low beams?
It is prohibited to use only fog lights instead of low beams at night. PTFs have a specific light distribution (wide fan beam) and are not intended for illuminating the road over a long distance. They can only be used in conjunction with low or high beams.
What is the penalty for improper use of high beams?
For driving a car with an external light device, the operating mode of which does not meet the requirements (for example, high beams on in the city or fog), you are subject to a warning or a fine of 500 rubles (Part 1 of Article 12.20 of the Code of Administrative Offenses of the Russian Federation). However, the risk of blinding and creating an emergency situation is much more serious than a monetary penalty.
How often do headlight bulbs need to be changed?
The service life of lamps depends on their type and quality. Halogen lamps last on average 500-1000 hours, xenon lamps - up to 3000 hours, LED modules can operate for 10,000 hours or more. It is recommended to change lamps in pairs, since the brightness of the old lamp may differ from the new one, which will disrupt the symmetry of the light beam.