Reverse AEB: Not Flawless

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Recent AAA research has spotlighted the performance of reverse automatic emergency braking (AEB) systems in four 2023 model-year vehicles, revealing limitations in their effectiveness. These systems, equipped with rear cross-traffic mitigation, are integral in reducing rear-end collisions but are not infallible.

Exploring AEB Performance

The focus of this study was on the efficacy of reverse AEB systems in two specific scenarios: when a vehicle backs out of a parking space into an oncoming vehicle’s path with its view obstructed by another parked vehicle, and when a stationary child pedestrian is behind the vehicle. The objective was to assess how well these systems can identify and react to imminent collisions.

Key Findings Revealed

  • In scenarios involving a vehicle crossing behind the test vehicle, reverse AEB systems engaged brakes in 65% of tests and avoided collisions in 2.5%.
  • When a stationary child pedestrian was placed behind the vehicle, the systems activated brakes in 75% of instances and successfully prevented collisions in 50% of the cases.

Greg Brannon, AAA’s director of automotive engineering, emphasized, “Drivers should not solely rely on these advanced driving systems to prevent collisions,” advocating for these technologies to complement rather than replace driver vigilance.

AAA’s Guidance for Drivers

  • Enhance awareness using reverse AEB in conjunction with backup cameras and sensors.
  • Proceed cautiously around obstructions to give ADAS sensors ample opportunity to detect potential hazards.
  • Ensure system functionality by regular checks and maintenance, as highlighted in AAA’s report on repair costs post-crash.

Industry Recommendations

The study underscores the need for uniform testing standards in the U.S. to verify the reliability of reverse AEB systems in diverse real-world conditions. A comprehensive testing approach is crucial for maximizing the safety benefits of these technologies for all road users.

Methodological Approach

AAA partnered with the Automobile Club of Southern California’s Automotive Research Center to test four popular 2023 model-year SUVs equipped with reverse AEB and rear cross traffic mitigation capabilities. The vehicles selected were the 2023 Hyundai Tucson Hybrid, 2023 Lexus RX 350 Limited AWD, 2023 Mazda CX-30 2.5 Turbo AWD Premium Plus Package, and the 2023 Volkswagen Tiguan 2.0T SEL R-Line.

See also: AAA Finds ADAS Do Less to Assist Drivers and More to Interfere

About AAA

Since its inception in 1902, AAA has evolved into a major North American membership organization, offering a wide range of services from roadside assistance to travel and insurance benefits. Today, it serves over 64 million members across the continent, including more than 57 million in the U.S. For more information or to become a member, visit

This study not only highlights the capabilities and limitations of reverse AEB systems but also calls for enhanced standards and practices to ensure the safety and reliability of these advanced driving aids.

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