NHTSA Proposes Rule Change to Eliminate Mandatory Brake Pedals in Purpose-Built Autonomous Vehicles

The science-fiction vision of a car without a steering wheel or brake pedal has long clashed with the rigid reality of federal automotive regulations. For decades, the Federal Motor Vehicle Safety Standards (FMVSS) have mandated that every passenger vehicle sold in the United States include physical, human-operated controls, regardless of whether a human is actually doing the driving.

That regulatory wall is now coming down. On June 25, 2026, the National Highway Traffic Safety Administration (NHTSA) officially proposed a rule change to eliminate the manual brake pedal requirement for vehicles designed exclusively for automated driving systems.[2]

The proposal targets FMVSS No. 135, the federal standard governing light vehicle brake systems. Under the new framework, purpose-built autonomous vehicles—those with no provision for a human driver—would be entirely exempt from installing hand- or foot-operated brake controls.

Crucially, this does not mean autonomous vehicles will lack brakes. NHTSA was explicit that all braking performance requirements, including strict stopping distance standards, remain fully in effect. Instead of a human pressing a pedal, compliance will be demonstrated through alternative testing procedures that verify the vehicle's software and hardware can safely halt the car when commanded.[1][2]

"We are at the cusp of the greatest technological revolution in vehicle technology since the innovation of the Model T," NHTSA Administrator Jonathan Morrison said in a statement announcing the proposal. Morrison framed the move as an effort to tear down pointless barriers to innovative designs while holding developers accountable for safety performance.

For the autonomous vehicle industry, the manual brake pedal mandate had become a severe commercial bottleneck. Previously, any company building a purpose-built robotaxi without standard controls had to petition the federal government for an individual exemption.

Those exemptions were not only slow to process but came with strict volume caps, legally restricting manufacturers to deploying no more than 2,500 such vehicles per year. This cap made it functionally impossible to scale a nationwide robotaxi network using custom-built hardware.[1]

The regulatory friction has already claimed high-profile casualties. In 2024, General Motors halted development of its Origin autonomous shuttle, citing the regulatory uncertainty surrounding the vehicle's lack of manual controls. Similarly, Amazon-owned Zoox faced a federal compliance investigation in late 2024 over its custom-built, pedal-free robotaxis.

If finalized, the new rule would replace the vehicle-by-vehicle exemption gauntlet with a blanket standard, allowing companies to scale production without federal volume caps. The clearest immediate beneficiaries are Tesla and Zoox, both of which have staked their autonomous futures on vehicles lacking traditional controls.

Tesla's recently unveiled Cybercab, a two-seat robotaxi, was designed entirely without a steering wheel or pedals. While Tesla currently tests its autonomous software on standard vehicles equipped with manual controls, CEO Elon Musk has repeatedly promised to deploy the purpose-built Cybercab at massive scale once regulatory hurdles are cleared.

The brake pedal proposal is part of a broader "AV Framework" pushed by the Department of Transportation under Secretary Sean Duffy. It follows a pattern of regulatory modernization; the Biden administration previously finalized rules allowing autonomous vehicles to operate without steering wheels, and recent proposals have targeted windshield wipers and rearview mirrors.

However, the removal of physical controls has sparked debate among safety advocates. Without a brake pedal, there is no in-cabin mechanical fallback if the autonomous system fails or behaves erratically.

In the absence of human controls, companies are increasingly relying on teleoperation—remote monitoring centers where human technicians can intervene or safely route a vehicle during edge cases. Tesla, for instance, has acknowledged using teleoperators to monitor and occasionally move vehicles remotely after incidents.

Philip Koopman, an emeritus professor of electrical and computer engineering at Carnegie Mellon University and a prominent AV safety expert, noted that removing historically unintended restrictions on autonomous vehicles is generally a positive step. "It is appropriate to modify the Federal Motor Vehicle Safety Standards to remove unintended barriers to driverless vehicle deployment," Koopman stated.

Yet Koopman also highlighted a critical regulatory gap: while NHTSA is busy removing legacy rules, there are currently no FMVSS parts that are specific to autonomous vehicle software. "It is long past time to see movement in adding new safety standards relevant to this new technology as well," he warned.

The proposal is now open for a 30-day public comment period, ending July 27, 2026. If the rule survives potential opposition from safety groups and is finalized, it will mark the moment the federal government officially decoupled the definition of a car from the presence of a human driver.[2]