After nearly a decade of discussions, the federal mandate for automatic emergency braking (AEB) systems has been finalized. But not everyone is on board.
Mandatory AEB for All New Vehicles by 2029
In a historic step to enhance road safety, the National Highway Traffic Safety Administration (NHTSA) issued a new Federal Motor Vehicle Safety Standard in April 2024. Starting September 2029, all new passenger cars and light trucks sold in the United States must include automatic emergency braking (AEB) systems capable of detecting both vehicles and pedestrians.
This landmark rule comes after years of voluntary efforts led by the U.S. Department of Transportation (DOT) and the Insurance Institute for Highway Safety (IIHS). Initially, nearly every automaker pledged to make AEB standard by 2022, aiming for 99% coverage of new vehicles. However, delays and uneven implementation prompted NHTSA to formalize the requirement. The agency projects the mandate will save at least 360 lives and prevent 24,000 injuries annually.
Automakers Voice Concerns
Despite broadly supporting the life-saving potential of AEB, automakers, represented by the Alliance for Automotive Innovation (AAI), have raised significant concerns. In a June 2024 letter to NHTSA, AAI Vice President Sarah Puro identified five key issues with the finalized rule:
- Unrealistic Test Standards: AAI criticized the “no contact” requirement during vehicle and pedestrian tests, calling it impractical without multiple test runs.
- Malfunction Indicator Lamp (MIL): Automakers argued that illuminating the MIL for all malfunctions is excessive.
- No Manual Deactivation: The inability to deactivate AEB in situations where its operation might be hazardous was flagged as a potential safety risk.
- Unclear Standards for Alerts: The group sought clearer criteria for audio and visual signals triggered by Forward Collision Warning systems.
- High Costs: The final rule’s requirements, according to AAI, could drive up costs for consumers.
Automakers also argued that the U.S. rule deviates from global standards and could result in “aggressive and unpredictable braking” that frustrates drivers.
NHTSA Declines to Reconsider
In response to automaker petitions, NHTSA refused to backtrack on the rule. While minor clarifications were made, such as adjusting pedestrian obstruction test scenarios and forward collision warning requirements, the agency stood firm on the 2029 implementation timeline. “The effective date for the rule remains September 2029,” a spokesperson confirmed.
This decision drew mixed reactions. Safety advocates, including the National Transportation Safety Board (NTSB), applauded the move, emphasizing the potential to save lives. NTSB Chair Jennifer Homendy urged automakers to adopt the standards immediately rather than wait until 2029.
Automaker Pushback Continues
The AAI remains critical of the decision, escalating its concerns to policymakers. In a recent letter to President-elect Trump, the group requested a review of the rule, describing it as a missed opportunity for collaborative safety innovation.
“What a waste,” said AAI President John Bozzella. “A decade-long partnership that made AEB nearly universal was just tossed aside. This rule is wrong on the merits, wrong on the science.”
What’s Next?
While the finalized rule is unlikely to change, industry observers expect ongoing debates. Automakers are pushing for flexibility in implementing AEB, emphasizing the need to align with global standards and reduce costs.
For now, NHTSA’s mandate marks a pivotal step toward safer roads, with the potential to prevent thousands of crashes annually. However, how automakers balance innovation, compliance, and consumer satisfaction will shape the future of this life-saving technology.
