Southern California AAA’s 2024 research shows new model vehicles with automatic emergency braking (AEB) avoided 100% of forward collisions at speeds up to 35 mph, compared to older models (2017–2018) that avoided collisions 51% of the time.
AEB uses cameras and sensors to apply brakes when a crash seems imminent, and a recent NHTSA rule will require AEB in all new vehicles by 2029.
Greg Brannon, AAA’s automotive engineering research director, noted advancements in AEB since 2014, though work remains to ensure efficacy at higher speeds.
AAA’s tests in a simulated environment compared old and new model vehicles at 12, 25, and 35 mph. Results showed 2024 models nearly doubled collision avoidance rates compared to older models, signaling substantial safety progress. At 45 mph, three out of four vehicles avoided collisions, but none avoided them at 55 mph. The NHTSA’s upcoming 2029 rule requires AEB to avoid forward collisions at up to 62 mph.
AAA encourages automakers to improve high-speed AEB, prioritize earlier Forward Collision Warning alerts, and invest in R&D to enhance AEB performance, focusing on sensor technology and braking algorithms for high-speed scenarios.
Encouraged by the new NHTSA ruling, AAA offers the following advice to industry:
· Continued Development of Advanced AEB Systems: Automakers should prioritize developing AEB systems for high-speed scenarios like those in the new FMVSS 127. These systems have already displayed significant efficacy in preventing collisions up to 35 mph.
· Enhance Forward Collision Warning (FCW) Alerts: If FCW systems offer earlier alerts, they can provide drivers with additional reaction time, decreasing the sole reliance on AEB systems. This approach can establish a more cooperative safety mechanism where both the driver and the vehicle collaborate to prevent collisions.
· Research and Development for High-Speed Scenarios: Ongoing investment in research and development is crucial for improving the effectiveness of AEB systems at higher speeds. This involves advancing sensor technologies, optimizing braking algorithms to minimize false positives, and undertaking comprehensive real-world testing to meet updated regulatory requirements and guarantee safety at higher speeds.
Driver Advice
·Having these systems in your vehicle can help prevent collisions. However, never rely solely on technology to apply the brakes. AEB systems are not a replacement for an attentive driver.
Drivers should be aware of the limitations of an AEB system and stay engaged while driving. Drivers need tom aintain focus, even when driving vehicles equipped with advanced safety features.
Engaging in risky driving behaviors such as speeding, texting, driving while drowsy or distracted, or driving under the influence of cannabis or alcohol significantly increases the risk of a collision.
Always stay alert! Follow speed limits, keep your smartphone out of reach, and only drive when sober.
Methodology
In partnership with the Automobile Club of Southern California’s Automotive Research Center, AAA tested early and late model vehicles from the same automaker evaluated back-to-back on the same day to eliminate any testing bias. Vehicles were driven on a closed-course roadway with a DRI Soft Car 360® positioned at the end of the course, with the rear facing the subject vehicle. Standardized AEB testing speeds were as follows: 12 mph (+/− 1 mph): 5 test runs, 25 mph (+/− 1 mph): 5 test runs, 35 mph (+/− 1 mph): 5 test runs. 45 mph (+/− 1 mph): 5 test runs, and 55 mph (+/− 1 mph): 3 test runs. Please refer to the full report for details on the methodology, including specific testing equipment and test track characteristics.