Every passenger car driver has at least once encountered a situation when a truck suddenly changes lanes into your lane - seemingly for no reason. In fact there is a reason: truck blind spot several times more than that of passenger cars, and the driver physically cannot see your car in the mirrors. According to traffic police statistics, up to 30% of accidents involving trucks occur precisely because of failure to maintain distance in blind spots.
In this article, we will look at where exactly the blind spots are located in different types of trucks (from eurotrucks up to length), how to identify them by external signs, and why even experienced truck drivers sometimes do not notice passenger cars. We’ll also give you a checklist of actions that will save your life when overtaking or driving next to a truck.
What is a truck’s blind spot and why is it more dangerous than a car’s?
The blind (or dead) spot is the area around the car that cannot be seen in the mirrors or through the windshield. In passenger cars, such a zone is minimal (usually on the sides behind the C-pillar), but in trucks it turns into a whole “shadow” where several cars can hide.
The main reasons for huge blind spots in trucks:
- 🚛 Cabin height: The driver sits 2–3 meters above the road, and the downward viewing angle is limited by the hood and bumper.
- 🪞 Limited mirrors: even with side “wide-angles” (Class II and IV mirrors) the driver does not see the space closer than 1–1.5 meters from the cab.
- 📏 Trailer length: y road trains (truck + trailer) the dead zone extends to
5–7 metersbehind and on the sides. - 🔄 Turns: when maneuvering, the trailer “cuts” the corner, and the driver loses visibility
30–50%more than with straight motion.
According to European Transport Safety Council (ETSC), in 2023, one in five deaths on EU highways were related to truck blind spots. In Russia the situation is even worse: according to Rosavtodor, on federal highways the share of such accidents reaches 28%.
7 truck blind spots that every driver should know
A truck creates not one, but several blind spots, and each of them is dangerous in its own way. Let's look at them using the standard example eurotrucks (length 16.5 m, cabin height 3.8 m). For clarity, here is a table with zone sizes:
| Zone | Location | Size(m) | Danger |
|---|---|---|---|
| 1. Front | Directly in front of the hood | 3–5 | The driver does not see the car if it is below the bumper |
| 2. Right side (passenger) | From the cab to the middle of the trailer | up to 3 | Largest blind spot when turning right |
| 3. Left side (driver's) | From the cab to the beginning of the trailer | 1–1,5 | Smaller than the right one, but dangerous when overtaking |
| 4. Rear | Behind the trailer | 5–7 | The driver does not see the car if it is closer than 10 m |
| 5. “Diagonal” when turning right | From the front bumper to the rear axle of the trailer | up to 12 | When turning, the trailer will “sweep” this area |
Most dangerous zone - right lateral. This is where collisions with cyclists, motorcyclists and cars most often occur when a truck turns. A truck driver may not be able to see your vehicle even if it is at a distance 2–3 meters from his cabin!
Why do truck drivers sometimes not look in their mirrors?
Many trucks are equipped with cameras instead of mirrors (system Camera Monitor System, CMS), but their view is limited by the angle of the lens. In addition, drivers often rely on navigation and do not have time to monitor all zones at the same time, especially in the city.
How to tell if you're in a truck's blind spot: 5 visual signs
If you can’t see the truck driver in the side mirror of your car, it means he can’t see you either. But there are other signs:
- You can't see the driver's face in the cab window. If your truck's rearview mirror doesn't show your car, you're in a blind spot.
- The truck starts maneuvering without a turn signal. Often drivers turn on the turn signal already in the process of changing lanes, when they see free space.
- You are at trailer level. If your car is level with the middle of the truck, you are in the most dangerous side zone.
- Truck driver slows down for no reason. This could mean that he noticed you at the last moment.
- You're driving too close behind. If the distance is less
10–15 meters, the driver will not see you in the mirrors.
If you are overtaking a truck, and the driver starts blinking his high beams, this is a signal: “I don’t see you, don’t overtake!” In Europe and the USA, this gesture means “Pass by”, but in Russia it is often used as a warning.
Do not linger at the level of the trailer|Keep a distance of at least 15 m behind|When overtaking, accelerate quickly, but without jerking|Do not slow down near a truck turn|Use the horn if the driver does not react-->
Why overtaking a truck is one of the most dangerous maneuvers
Overtaking a truck on the highway requires not only speed, but also an understanding of the physics of movement. This is what happens when you try to overtake a truck:
- 🌀 The "suction" effect: when overtaking at speed
90+ km/ha zone of low pressure is created between your car and the trailer, which can “pull” you under the wheels. - 🚗 Blind spot when overtaking: While you are at cabin level, the driver cannot see you. Only when your car is ahead of the cab by
3–5 meters, you will come into his field of vision. - 🛣️ Braking distance: a loaded truck slows down
2–3 times longercars. If the driver brakes suddenly, you may not have time to react.
Critical error: Many drivers start changing lanes back immediately after passing the cab, without waiting for the trailer to remain behind. This leads to collisions because the truck driver may not have time to react to your maneuver.
Overtake a truck only if you can see the road 200–300 meters ahead. If there is a turn or descent ahead, it is better to wait.
What to do if a truck starts changing lanes into your lane
Situation: you are driving in the middle lane, and a truck on the right begins to move to the left - right at you. Your actions:
- Don't brake suddenly — the driver of the truck may not have time to react, and the trailer will “cover” your car.
- Slow down smoothly and let the truck complete the maneuver. If possible, move to the left.
- Signal with short beeps (not a long sound!) to attract the driver's attention.
- Don't try to jump ahead - in 90% of cases this leads to an accident.
If the truck is being rebuilt from the left lane to yours (for example, on a three-lane highway), your chances of avoiding an accident are higher: you have room to maneuver to the right. But remember: truck drivers often do not see cars that are driving behind them at a distance of less than 10 meters.
If a truck flashes its left turn signal, but does not begin the maneuver, do not rush to overtake it on the right. Perhaps the driver is waiting for the left lane to open and does not see your car.
Tech Solutions: How Trucks Combat Blind Spots
Modern trucks are equipped with systems that help drivers monitor blind spots:
- 📹 360° cameras (Bird View): show the situation around the truck on the screen in the cab. For example, the system Mobileye or Bendix Wingman.
- 🔔 Radars and sensors: Warns the driver with an audible signal if there is an object in the blind spot. Popular solutions from Bosch and Continental.
- 🔦 Additional mirrors: installed on new trucks class V and VI mirrors, which cover the side zones.
- 🤖 Automatic braking systems (AEBS): triggered if the truck approaches an obstacle in the blind zone.
However, even with these systems the truck driver does not always have time to react. For example, cameras Mobileye have an image processing delay of up to 0.5 seconds, and at speed 80 km/h during this time the car passes 11 meters.
⚠️ Attention: In Russia, installation of systems is mandatory from 2026 AEBS and LDWS (lane departure warning) on new trucks weighing over 3.5 tons. However, older trucks (manufactured before 2020) may not have such systems.
Safety rules: how to drive near trucks without risk
To minimize risks, follow these rules:
- Keep your distance: rear - no less
15 meters, front -30 meters. - Don't hang out near the trailer: If you overtake, do it quickly and decisively.
- Avoid the right side of the truck: This is the largest blind spot, especially when cornering.
- Turn on low beams during the day: This helps the truck driver notice you in the mirrors.
- Do not overtake a truck on a descent or ascent: Visibility is limited and stopping distances are increased.
If you see that the truck driver is starting a maneuver, but does not give any signals - assume he doesn't see you. It is better to slow down in advance than to rely on his reaction.
In the city, never overtake a truck on the right at an intersection. The driver may turn right without noticing your car in the blind spot.
FAQ: Frequently asked questions about blind spots on trucks
Is it possible to overtake a truck in rain or fog?
Overtaking in poor visibility conditions is extremely dangerous. In the rain, the stopping distance of a truck increases by 30–50%, and the driver may not see your car due to fogged windows or splashes from the wheels. If you still have to overtake, turn on fog lights and increase the distance to 50 meters.
Why do trucks sometimes get cut off when overtaking?
This happens due to bullwhip effect: when the truck brakes, the trailer continues to move forward by inertia and shifts to the left. The driver may not have time to correct the trajectory, especially on a slippery road. To avoid this, never overtake a truck at low speed (less than 20 km/h difference).
How to behave if a truck starts to slow down in front of a traffic light?
Don't try to pass on the right - the driver may not see you in the mirror. It’s better to move into the left lane in advance or stop behind a truck, keeping your distance 5–10 meters. Remember: when braking, a loaded trailer can “peck” forward by 1–1.5 meters.
What to do if the truck blinks its headlights?
In Russia and Europe this may mean:
- ✅ "Pass by" (if the truck drives slowly and lets you pass).
- ⚠️ “I don’t see you, don’t overtake!” (if you are in a blind spot).
- 🚨 "Danger Ahead" (Accident, traffic police post, pothole on the road).
Focus on the context: if a truck is driving fast and blinking, it’s better not to overtake. If it’s slow and misses, you can speed up.
Why is it more dangerous to overtake trucks at night?
At night:
- 🌑 The truck driver sees worse in the mirrors due to glare from the headlights of oncoming cars.
- 🚗 Your car is harder to notice if your side lights or daytime running lights are not on.
- 🛣️ The risk of blinding from truck headlights increases (especially if it has xenon or LED).
When overtaking at night turn on the low beam (not long-distance!) and increase the distance to 20–25 meters.