The United States introduces major vehicle safety changes in 2026: mandatory automatic emergency braking standards for all new vehicles by 2029, development of impaired driving prevention technology under the Bipartisan Infrastructure Law, updated NCAP safety ratings, and new autonomous vehicle framework regulations.
Safety Rules
Effective September 1, 2029
Before
Voluntary AEB adoption
AEB systems were voluntarily adopted by most manufacturers but not federally required
After (2026)
Mandatory AEB for all vehicles
All passenger cars and light trucks must have AEB that works up to 62 mph for vehicles and includes pedestrian detection in daylight and darkness
NHTSA finalized FMVSS No. 127 requiring AEB on all new vehicles by September 2029. Systems must apply brakes automatically up to 90 mph for lead vehicles and 45 mph for pedestrians. This standard is expected to save 360 lives and prevent 24,000 injuries annually.
Safety Rules
Effective January 1, 2027
Before
No impairment detection required
Vehicles had no built-in systems to detect or prevent drunk/impaired driving
After (2026)
Impairment detection standards in development
Bipartisan Infrastructure Law Section 24220 requires NHTSA to develop standards for technology that passively detects driver impairment and prevents vehicle operation; rulemaking ongoing
The 2021 Infrastructure Investment and Jobs Act mandates impaired driving prevention technology in new vehicles. NHTSA issued an ANPRM in January 2024 and is evaluating breath-based sensors, touch-based infrared systems, and camera-based monitoring. The final rule timeline remains uncertain; implementation is expected no earlier than 2027-2028 once technology is ready.
Safety Rules
Effective September 1, 2029
Before
No pedestrian AEB requirement
Pedestrian detection was an optional feature, not federally mandated
After (2026)
Mandatory pedestrian detection
All new vehicles must detect pedestrians in daylight and darkness and automatically brake up to 45 mph to avoid collisions
Pedestrian fatalities increased 51% between 2001 and 2021 while vehicle occupant deaths decreased. The new AEB standard specifically addresses this by requiring nighttime pedestrian detection. Always stay alert for pedestrians, especially at night.
Safety Rules
Effective January 1, 2027
Before
Crash test ratings only
NCAP 5-star ratings based primarily on crash test performance
After (2026)
ADAS features in ratings
New ratings include blind spot warning, blind spot intervention, lane keeping assist, and pedestrian AEB (delayed from MY2026 to MY2027)
NHTSA originally planned to add driver assistance features to the 5-star safety ratings for 2026 model year vehicles, but this has been postponed to 2027 to address industry concerns and finalize test procedures. When shopping for a new car, look for these ADAS features.
Licensing
Effective January 1, 2026
Before
Limited AV regulations
Federal Motor Vehicle Safety Standards written for human-operated vehicles only
After (2026)
Modernized AV standards
NHTSA launching rulemakings to update FMVSS for vehicles with automated driving systems (ADS), including standards for vehicles without manual controls
NHTSA is modernizing safety standards for autonomous vehicles. New rules address vehicles without steering wheels or pedals, updating standards like FMVSS 102 (transmission), 103 (defrosting), and 104 (windshield wipers) that assumed human drivers. Self-driving vehicles are coming.
Environmental Zones
Effective January 1, 2026
Before
Previous CAFE standards
Corporate Average Fuel Economy standards set under previous administration
After (2026)
Revised MY 2022-2031 standards
New rulemaking adjusting fuel economy requirements for passenger cars and light trucks through model year 2031
The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule III sets fuel economy standards through 2031. This affects the vehicles available on the market and their efficiency ratings. More fuel-efficient vehicles help reduce both costs and emissions.
NHTSA finalized a rule requiring AEB on all passenger cars and light trucks by September 2029. The systems must stop vehicles to avoid collisions up to 62 mph and must detect pedestrians in both daylight and darkness. This is expected to save 360 lives and prevent 24,000 injuries annually.
The 2021 Bipartisan Infrastructure Law requires NHTSA to develop standards for impaired driving prevention technology. NHTSA is currently in the rulemaking process, evaluating breath-based sensors, touch-based infrared systems, and camera monitoring. No final rule has been issued yet; implementation is expected no earlier than 2027-2028 once technology is mature and standards are finalized.
NHTSA is adding Advanced Driver Assistance Systems (ADAS) to the NCAP ratings, including blind spot warning, blind spot intervention, lane keeping assist, and pedestrian AEB. Originally planned for 2026 model year, this update has been delayed to 2027 to address industry concerns and finalize testing procedures.
NHTSA is updating Federal Motor Vehicle Safety Standards for autonomous vehicles. New rulemakings will modify standards that assumed human drivers, allowing vehicles with automated driving systems (ADS) that may lack steering wheels or pedals. This is part of the DOT's innovation agenda announced by Transportation Secretary Sean Duffy.
All rule changes are sourced from official government transport agencies and legal publications. AutoviaTest is an independent educational platform and is not affiliated with any government agency. Rules may be subject to change before their effective dates.
Information last verified: February 1, 2026
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