Understanding Advanced Driver Assistance Systems (ADAS)
Road accidents are mainly caused by human errors, but Advanced Driver Assistance Systems (ADAS) were created to tackle this problem. ADAS, which stands for Advanced Driver Assistance Systems, are now commonplace in daily life, and in modern cars, some of these systems are mandatory. This article will explain the components of ADAS and how they work.
What is ADAS?
Advanced Driver Assistance Systems (ADAS) is a group of automotive systems that use multiple sensors, cameras, and radars to monitor the car's surroundings. By processing the data in control units, the output units can react promptly when necessary. The first ADAS was the Anti-Lock Braking System (ABS), which was introduced in the 1970s and is now a standard feature in most vehicles. Over time, engineers have continuously developed new safety systems, leading to the current situation where vehicles are equipped with numerous advanced systems capable of autonomous driving. Consumers are increasingly prioritizing safety features when purchasing vehicles.
What is the ADAS Function?
ADAS components were designed to supplement human abilities when they are unable to perform certain tasks that could lead to dangerous situations on the road. These engineering achievements, coupled with human abilities, aim to minimize road accidents and ultimately save lives and preserve health.
What is ADAS in a Car?
Advanced Driver Assistance Systems (ADAS) refer to the group of automotive systems that use multiple sensors, cameras, and radars to monitor a car's surroundings. They process the data in control units, allowing output units to react promptly when necessary. The components of ADAS in a car can be broadly classified into Autonomous Systems and Warning Systems.
Autonomous systems
The older and most common systems are ABS (Anti-Lock Braking System), ESP (Electronic Stability Program), and TCS (Traction Control System). ABS monitors the speed of each wheel of the car and adjusts the braking force on each wheel separately as needed to prevent skidding and maximize braking efficiency. ESP and TCS prevent car skidding during acceleration and driving through corners, even without driver braking.
Newer systems capable of assuming the driver's role include Lane Keep Assist (LKA), designed to detect lane markings on the road and autonomously steer the car to maintain its position within the correct lane. Adaptive Cruise Control (ACC) adjusts the speed according to the vehicle in front and can even bring the vehicle to a stop if the vehicle in front stops. Automatic Emergency Braking (AEB) is the most complex system among ADAS, utilizing parking sensors, cameras, radars, and LiDAR to monitor the surroundings and initiate braking when the system detects the risk of collision.
Warning systems
ADAS also includes warning systems that provide an additional sense to use the vehicle safely. Some examples of these systems include Front and Rear Parking Sensors, Rearview Camera, Blind Spot Assist, Lane Departure Warning System (LDWS), and Driver Alert. Driver Alert uses cameras and control units to monitor the driver's behavior, movements, and driving style, sending acoustic, optical, or haptic warnings when necessary.
Levels of vehicles automation – ADAS in automotive
ADAS is closely connected with vehicle automation. Depending on the number and types of driver assistance systems installed in the car, the vehicle is assigned to a specified level of automation, ranging from Level 0 to Level 5.
Level 0
The driver has complete control over the car, with access to only some systems that assist him in specific situations. LDWS provides the driver with information about lane departure but cannot correct the car's path by itself. Other examples include sensors and cameras that warn the driver about obstacles while parking or driving. AEB also operates only during specified critical situations, similar to ESP or ABS.
Level 1
The car is equipped with one of the systems that can steer or accelerate and brake the car, such as Lane Keep Assist or Adaptive Cruise Control.
Level 2
The driver assistance systems can steer and accelerate/brake the car simultaneously, and a driver can turn off systems or take control of the car at any time.
Level 3
The systems take complete control over the car, and a driver can take a break from actively driving but must be able to react after receiving a warning sent by some of the ADAS components.
Level 4
The driver is no longer obligated to react and can even sleep while driving. This level can currently be used under certain conditions, such as on highways or defined routes.
Level 5
In this type of vehicle, there are no longer drivers, only passengers. It can drive under all conditions without any assistance from a human.
ADAS – present and future
Currently, modern cars come equipped with a broad range of Driver Assistance Systems, and there is a clear trend towards fully autonomous vehicles. Despite the remarkable progress in ADAS, drivers remain a crucial component of any car and will continue to be for the foreseeable future.
Maintaining all ADAS components in impeccable condition is crucial to ensuring their effectiveness. Even if a car is equipped with the latest systems, poorly serviced or improperly calibrated ADAS can pose more danger than assistance to the driver. It is essential to follow the car manufacturer's recommendations and strictly adhere to the testing procedures outlined in United Nations Regulations of the Economic Commission, which are mandatory in Europe. Compliance with these rules of use and servicing will guarantee that the ADAS work as intended and provide the necessary safety features to drivers.