The inclusion of passing beams or daytime running lights (DWL) in daylight hours is a mandatory requirement of traffic rules to increase the visibility of the vehicle on the road.
Ignoring this rule not only entails penalties from the traffic police, but also critically reduces the level of active safety, making the car almost invisible to other participants in certain weather conditions and terrain.
Statistics of road accidents convincingly prove that the forced use of lighting reduces the number of head-on collisions and accidents during restructuring, since the human eye responds more quickly to a contrasting light signal than to the silhouette of the body.
Automatic systems are used in modern cars, but the driver needs to understand the difference between the two. DHO and near-lightTo avoid problems with the law and ensure maximum lighting efficiency.
Physical principles of visibility and contrast on the roadh2>
The main reason why lighting devices should be used during the day is due to the physiological characteristics of human vision and the optical properties of the environment. Contrast The object relative to the background is a key factor in the detection: a car of dark color against a background of dark asphalt or in the shade of trees becomes almost indistinguishable without artificial lighting.
Daylight often creates difficult lighting conditions, including: counterlightingWhen the sun is behind the observer or blinds him. In such situations, the lights on create a bright spot that the driver’s brain perceives faster than the dimensions of the car.
Research shows that the driver’s response time to a car with headlights on is reduced by a few critical seconds, which at high speed is equivalent to tens of meters of braking distance.
- 🚗 Lighting devices create artificial contrast, highlighting the car from the general background.
- 👁️ The human eye detects a light source faster than a static object.
- ⛅ In fog, rain or snow, visibility is reduced, and headlights become the only marker of the vehicle’s presence.
It is important to understand that even the brightest color of the body does not guarantee safety, as glare The sun or wet pavement can completely hide the car from the eyes of other drivers.
Differences between DRL and passing headlights
Many drivers mistakenly believe that daytime running lights and passing lights are the same thing, but technically and legally they are different lighting systems. Daytime running lights Daytime Running Lights are designed specifically for daylight use and have brightness and scattering angles to not blind oncoming drivers, but be clearly visible.
Unlike them, passing-light It is designed to illuminate the road lane in the dark and has a more complex cut-off line. When using passing beams during the day, it is often necessary to turn on position lights and license plate illumination, which increases energy consumption and wear of lamps.
⚠️ Note: The use of position lights instead of DRL or passing beam in daylight is a traffic violation, since the dimensions are not bright enough to indicate the vehicle.
Modern cars are often equipped with switch-on DRL at start of the engine, which removes from the driver responsibility for manual control of light, but control over the serviceability of lamps remains on the owner.
Accident statistics and the impact of light on safety
Analysis of road statistics over the past decades shows a direct correlation between mandatory daylight use and a decrease in the number of severe accidents. In countries where the rule has been enforced, the number of frontal collision It's down 5-10 percent.
Especially high efficiency of using headlights when driving on country roads, where the speed limit is higher, and the attention of drivers can be dulled due to the monotony of the landscape. The light of the headlights allows you to notice the car leaving the secondary road or overtaking.
Below is a table showing the influence of various factors on the visibility of the car:
| Traffic conditions | No lights. | DHO | With a passing light |
|---|---|---|---|
| Clear weather, straight road | Low. | Tall. | Tall. |
| Rainstorm/Fog | Critical | Medium | Tall. |
| Departure from the corner | Late. | Timely | Timely |
| Movement in the shade of trees | Low. | Tall. | Tall. |
Thus, even a minimal effort to turn on the lights significantly increases the chances of avoiding an accident, making the car predictable to others.
Historical background
The first requirements for the mandatory use of daylight appeared in the Scandinavian countries in the 70s of the XX century. The harsh climate, frequent fogs and short daylight hours made this measure necessary for survival on the roads. Later, the positive experience was extended to the EU countries and other regions of the world.
Technical aspects and resource of lighting devices
There is a common myth that driving with the lights on constantly leads to the lamps burning out quickly and the battery draining. In fact, modern generators easily cope with the additional load, and the life of lamps in the mode of DRL or passing beam is designed for thousands of hours of operation.
However, if you use old halogen lamps in mode passing beamTheir service life can indeed be shortened compared to the use of specialized LED DRLs. LEDs consume less energy and have a significantly larger working life.
- 💡 Halogen lamps are sensitive to voltage surges and frequent on/off switches.
- 🔋 LED technologies (LED) have virtually no impact on the fuel consumption and resource of the generator.
- 🔧 Regular check of the adjustment of the light beam is necessary so as not to blind oncoming transport.
To extend the service life of lighting devices, it is recommended to periodically check the condition contact group and the absence of oxidation in cartridges, especially in humid climates.
☑️ Checking of the lighting system
Legal regulation and penalties
In the Russian Federation, the rules for the use of external lighting are regulated by paragraph 19.5 PDD. All vehicles shall be driven during daylight hours with the passing beam headlamps or daytime running lamps switched on.
Violation of this requirement is qualified under part 1 of article 12.20 of the administrative code of the Russian Federation and entails the imposition of an administrative fine. Although the fine is small, systematic violations can lead to more serious consequences in the case of a complex accident.
⚠️ Attention: The absence of lights on during the day can be regarded by insurance companies as contributory negligence (mixed wine), which will reduce the amount of payment for OSAGO or CASCO.
It is also important to monitor the serviceability of lighting devices: driving with a broken headlight or DHO It is also a violation and may result in a separate punishment.
Psychology of perception and preventive safety
In addition to physical visibility, the lights on play an important psychological role. They signal to other road users that the car is driven by an attentive driver who follows the rules. This creates a more predictable and safe environment on the road.
Drivers who see a car with the lights on subconsciously estimate the distance to it more accurately and begin maneuvers to rearrange or braking earlier. This is especially true in the context of dense urban traffic.
Ignoring the rule of lighting during the day is not just a formal violation, it is the rejection of one of the easiest and most effective ways to protect your life.
Tip: If your car does not automatically turn on the lights, develop a habit of turning on the passing light or DRL immediately after starting the engine, before starting the movement. It will take 2 seconds, but it can save a life.
The main conclusion: Driving with lights on during the day is a mandatory requirement of traffic rules, which statistically reduces the risk of accidents and makes you noticeable to other drivers in any conditions.
Frequently Asked Questions (FAQ)
Do I need to turn on the passing light if there is a DHO?
No, if your car is equipped with serviceable daytime running lights, corresponding to GOST, the inclusion of passing beams is not required. However, if the DRLs are missing or defective, the use of a passing beam is mandatory.
Does the lights on the lights at night threaten to be fined?
Yes, driving in the dark or in conditions of insufficient visibility with the headlights off is also a traffic violation and entails a fine. It is also extremely dangerous to life.
Can you drive during the day with only lights?
No, position lights are not intended to indicate the car in motion in daylight hours. Their brightness is not sufficient for safety, and for their use instead of DRL or passing beam can write a fine.
Does the constant operation of the headlights affect fuel consumption?
The impact is minimal and is less than 0.1 litres per 100 km for modern cars. The fuel savings from lights out are not comparable to the safety risks.