Learn about the LDWS lane departure warning system on cars

To protect the driver and other passengers in the vehicle, safe driving assistance technology is continuously being improved. One of today’s prominent smart safety technologies is the lane departure warning system, which helps drivers stay in the right lane and reduce the risk of collision. So how does the system work? What does the structure include? Today we will learn about this system.

What is the LDWS lane departure warning system?

In fact, many accidents occur because the driver of a steering wheel vehicle is relatively new and cannot control and shape his or her direction. Lane Departune Waring System (LDWS) designed to keep vehicles moving safely in their lanes.

If the vehicle is at risk of leaving its lane, this will trigger a warning, keeping the driver alert. The system considers whether the direction indicator is being used or not, thus preventing false warnings when the driver intentionally changes lanes.

This technology is intended to reduce collisions caused by vehicles driving in the wrong lane. The system also helps other road users feel more secure and helps drivers maintain better concentration while driving.

Previously, the LDW lane departure warning system was considered one of the high-end car safety technologies, so it was only available on luxury cars. But now, LDW has gradually appeared more in the popular segment on cars such as Mazda CX-3, Mazda CX-30, Mazda CX-5, Ford Ranger, Toyota Fortuner…

This system is divided into 2 types:

  • Passive system: This system will only provide warnings to the driver.
  • Proactive system: In addition to providing warnings, if it detects that the driver is not making any adjustments, the system will brake the wheels (brake the wheels on the opposite side of the lane departure direction), or if equipped with a steering system power, the system will slightly adjust the vehicle’s direction. This system is equipped with components such as: Camera, radar, combined with ABS to operate.

When does the lane departure warning system work?

The LDWS lane departure warning system issues a warning when it senses that the vehicle touches the line or is likely to touch the lane line without signaling left/right or accelerating to pass another vehicle.

On the control screen, the encroached lane boundary will appear on the left or right. The driver depends on the warning information to promptly steer the vehicle back to the original lane. Note, the vehicle must be moving at a speed of over 64 km/h for the lane departure warning system to be able to work correctly.

Mechanism of lane departure warning system

The lane departure warning system uses a front-mounted camera located at the top of the windshield to confirm whether the vehicle is within the white (or yellow) lane markings of the travel lane.

The vehicle’s built-in camera is used by the lane departure warning system to scan lane markings at specific speeds. An audible or vibrating warning will sound if the car drifts out of its lane without using a turn signal. However, lane departure warning only works well when the markings on the road surface are clear.

Specifically, method of operation of the lane departure warning system as follows:

The system uses cameras or infrared sensors on the front bumper, roof, windshield or dashboard. The camera verifies whether the vehicle is inside the lane markings.

The device will warn the driver with a sound if it detects that the vehicle is crossing the line. To recreate the feeling of crossing lane markings and help the driver pay attention, some systems incorporate a vibration motor into the steering wheel.

Benefits and limitations of lane departure warning systems:

About benefits

  • Assists in reducing collisions due to lack of concentration and driving off-track when the driver is drowsy.
  • Reduces the possibility of vehicles entering the curb and hitting the curb, leading to scratches.

About limitations

  • The camera may become blurred and malfunction due to weather conditions including rain, humidity, dust, or entering dark roads.
  • If road markings are too faint, detection and warning are very difficult.

Some questions when using the lane departure warning system

Questions 1: When the driver wants to change lanes, does the lane departure warning system work?

The answer is ARE NOT. The system will recognize the driver’s need to change lanes by receiving signals: Turn signals, accelerator pedal position (acceleration), steering angle. From here we can understand that changing lanes with the above signals will be understood by the system as intentionally deviating from the lane. If one of the above signals is missing, the system will understand that the vehicle is unintentionally deviating from its lane and will activate the lane departure warning.

Question 2: The lane departure warning system monitors lane markings while you are driving. But what happens if the road markings are blurred?

If lane markings are difficult to see or cannot detect, your lane departure warning system may not recognize the lane. So, if your car drifts to the right out of its lane, your lane departure warning system may not detect lane markings and may not warn you.

At this time, pay attention to your surroundings and observe traffic in the lane you are traveling in. Note that you should not use the lane departure warning system in bad weather conditions such as rain or snow because: the lane departure warning system cannot detect lane markings when there is any moisture. On the ground; When it snows, the system cannot see the road markings because it is covered by snow.

Question 3: When traveling on curves, does the lane departure warning system work well?

Your lane departure warning system is designed for roads that do not have sharp curves, such as highways without curves. Because the camera only looks forward, the system may have trouble detecting road markings on curves. Your lane departure warning system may not recognize lane markings near curves. It can also indicate that you are too close to a left or right even though you are in the middle of the lane.

In this case, drivers should not rely on the lane departure warning system but should focus on paying attention to the road they are traveling on as well as paying attention to surrounding traffic conditions to avoid dangerous situations. unfortunate accident.

CarOn Pro screen – smart equipment with integrated lane departure warning system

The LDWS lane departure warning system is a system of great interest. Many vehicles are equipped with lane departure warning systems, however, to easily observe and understand the signals from the system, as well as being able to integrate with many other utilities such as Camera360, Camera Reversing, Dashcam,… we need an optimal support device. That is a car smart screen.

As one of the most popular and popular brands today, CarOn smart car screens are being trusted and used by many customers. With outstanding features such as: modern design, designs suitable for many types of vehicles, support for Kiki Virtual Assistant, navigation map, tire pressure sensor, limitless entertainment,… especially Not to mention the ability to integrate lane warning system support. With this screen, your car will become more comfortable than ever.


Above is the information that CarOn provides to readers about the LDWS lane departure warning system. For further information, please contact hotline 0961247360 or website https://caronpro.vn/ for quick support.

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