Automatic Emergency Braking (AEB) is a safety feature designed to prevent or reduce the severity of crashes. Here's everything you need to know about AEB and how it can protect you on the road.

What Is AEB?

• Definition: A system that detects potential collisions and automatically applies brakes to prevent or mitigate impact.
• Difference from ABS:
• ABS (Antilock Braking System): Prevents wheel lock-up during braking, requiring driver input.
• AEB: Activates autonomously when a collision is imminent, braking automatically.

Types of AEB Systems

Standard AEB: Detects vehicles ahead and brakes to avoid collisions or lessen impact.

AEB with Pedestrian Detection: Brakes to avoid pedestrians or cyclists.

Rear AEB: Prevents collisions while reversing.

Benefits of AEB

• Reduces Crashes: Studies by the IIHS show a 50% reduction in rear-end collisions when AEB is paired with forward collision warning (FCW).
• Upcoming NHTSA Rule (2029):
• AEB systems must work up to 65 mph for vehicle collisions and 45 mph for pedestrian collisions.
• Expected to save 360+ lives and prevent 24,000+ injuries annually.

Key Features of a Good AEB System

• Timely Activation: Kicks in only at the last second to avoid unnecessary braking.
• High-Speed Capability: Some systems operate at highway speeds (>55 mph).
• Pedestrian and Cyclist Detection: Essential for urban safety.
• User Satisfaction: Most car survey respondents reported being "very satisfied" with their AEB systems.

Limitations of AEB

Partial Braking: Some systems apply only partial braking, requiring driver assistance.

Environmental Factors: Sensors and cameras can be affected by:
- Dirt
- Blinding sunlight
- Rain or fog

Nighttime Challenges: AEB with pedestrian detection may not work well at night or in turns.

Overzealous Braking: Complaints of sudden, unexpected braking in some models (e.g., Honda, Nissan).

Which Cars Have AEB?

• Nearly All New Cars: As of 2022, most new cars come with AEB due to a voluntary commitment by automakers.
• Variety of Names: Different automakers use unique terms for AEB systems (e.g., Toyota’s “Pre-Collision System,” Audi’s “Pre Sense Front”).

Common AEB System Names by Automaker

| Automaker | AEB Name/Package |
|------------------|------------------------------------------------------------|
| Acura | Collision Mitigation Braking System, AcuraWatch |
| Audi | Pre Sense Front, Pre Sense City |
| BMW | Frontal Collision Warning with City Collision Mitigation |
| Subaru | Pre-Collision Braking (EyeSight) |
| Toyota | Pre-Collision System with Pedestrian Detection (TSS-P) |
| Volvo | City Safety |

For a complete list, check automakers’ official websites or vehicle manuals.

Tips for Drivers Using AEB

• Stay Vigilant: AEB is a backup, not a substitute for attentive driving.
• Keep Sensors Clean: Regularly clean cameras and sensors to ensure proper functioning.
• Understand System Limits: Know the speed and environmental conditions under which your AEB system works effectively.

Final Thoughts

AEB is a valuable safety feature that can save lives and reduce crash severity. While it’s not perfect, advancements in technology are making it more reliable and accessible. Ensure your vehicle has AEB, and familiarize yourself with its capabilities for safer driving.

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