Safety Corner November 2026
AUTOMATIC EMERGENCY BRAKING
What Is Automatic Emergency Braking?
Automatic emergency braking is an advanced safety technology that can slow or completely stop a vehicle without driver input. That is, on its own, AEB can apply a vehicle’s brakes if the driver fails to do so. The AEB systems found in most new cars will bring the vehicle to a full and complete stop at slower speeds. A few systems also work at higher speeds.
Moreover, some, but not all, systems can recognize and brake for pedestrians, cyclists, and animals.
AEB first appeared on Volvo, Honda, and Mercedes-Benz models. Despite Honda’s role in mainstreaming this technology, AEB was most often found on high-end models for much of the past 10 years. However, it’s now often standard equipment for even entry-level models as inexpensive as the Nissan Versa.
According to the Insurance Institute for Highway Safety (IIHS), an independent, nonprofit scientific and educational organization, the technology is already slashing crash rates by as much as half for vehicles equipped with it. The U.S. government will require automatic emergency braking systems in all new cars beginning in 2029.
TIP: No advanced safety system is 100% foolproof, including automatic emergency braking. It is the driver’s responsibility to maintain control of their vehicle, no matter the advanced safety technologies it may feature. AEB is a driver’s helpmate, not a driver’s replacement.
How Does Automatic Emergency Braking Work?
Depending on the system’s design, automatic emergency braking relies on cameras, radar, or other sensors. When these technologies identify the potential for a collision with an object in your path, they automatically activate the braking system.
These systems do not guarantee that you’ll avoid a collision. Instead, they will try to stop your vehicle in time under typical situations. At a minimum, they slow your vehicle to reduce the severity of the impact.
Tip: AEB only functions when the camera, radar, or sensors can identify objects. Extremely bright sunlight, heavy rain, caked-on snow, darkness, and other factors affect automatic emergency braking operation.
Types of Automatic Emergency Braking
Detailing the types of available AEB systems is rather simple because there are really only variations on two core types:
Forward AEB – Forward AEB kicks into action when there is a danger of collision ahead. This can be a vehicle stopped or slowing.
Reverse AEB – Rear automatic emergency braking functions just like front auto braking, except it does so when the vehicle is in reverse. It will react to objects, such as cars, moving across your path when backing up, as well as to objects in your path.
Both types of systems utilize a combination of radar sensors, cameras, and occasionally infrared technology to detect objects in their path. If the driver fails to react to the potential danger, both systems apply the brakes to avoid or reduce the collision’s severity. Several variations of AEB exist:
Forward AEB with pedestrian detection is a forward AEB system that recognizes pedestrians, bicycles, and larger animals.
Low-speed automatic emergency braking is engineered for bumper-to-bumper traffic. It also functions in parking lots and other low-speed situations.
Intersection AEB, or left-turn AEB, reacts when you are indicating a left turn at an intersection that will put your vehicle directly in the path of oncoming traffic.
Automakers engineer high-speed AEB to bring a car traveling at highway speeds to a complete stop.
As this article suggests, this system is an assist to the driver, not a replacement for the driver.
Paul Ziegenhorn
Comments