The National Highway Traffic Safety Administration (NHTSA) announced a regulatory shift that could reshape how robotaxis operate: removing the requirement for brake pedals in fully autonomous vehicles. The agency is amending Federal Motor Vehicle Safety Standard (FMVSS) No. 135, a rule originally published in 1995 that governs light vehicle brake systems. The change doesn't alter stopping distance requirements; instead, it removes the mandate for a physical pedal in cars controlled by autonomous driving systems.

Why Are Regulators Removing This Requirement?

The NHTSA framed the change as part of an initiative to "safely unleash American innovation" by eliminating what it calls "pointless" barriers to autonomous vehicle development. Since passenger cars have evolved dramatically since 1995, the agency argues that modern robotaxis don't need the same physical controls as human-driven vehicles. Instead of requiring a brake pedal, autonomous vehicles would have their braking systems evaluated using "alternative" methods that account for how self-driving technology actually works.

This regulatory move directly benefits companies pursuing different autonomous strategies. Waymo, for instance, operates its robotaxis without human safety monitors inside the vehicle, while Tesla still includes safety monitors in its Cybercabs, though the company is testing versions without human inputs in Austin. The rule change accommodates both approaches by removing a control mechanism that neither company necessarily needs.

What Other Controls Are Being Eliminated?

The brake pedal isn't the only traditional car control facing removal. The NHTSA proposal also addresses other features that autonomous vehicles don't require, such as windshield wiper controls. These modernizations reflect a broader shift in thinking about what a vehicle needs when no human driver is present to operate it.

• Brake Pedal Requirement: Removed for vehicles with autonomous driving systems, since the ADS handles braking automatically without human intervention
• Wiper Controls: No longer mandated, as autonomous vehicles don't need manual windshield wiper operation
• Brake Indicator Lights: The NHTSA tentatively disagrees with removing these "telltales," arguing that occupants should still see brake status information even in driverless cars

What Safety Concerns Remain Unaddressed?

While the NHTSA frames this as a safety-neutral modernization, critics point to a significant gap in the proposal. A footnote on page 9 of the regulatory framework reveals that the agency is "taking no position at this time as to how a passenger should be able to direct an ADS-operated vehicle to stop, or how the ADS should respond to such direction." In other words, regulators haven't yet established what passengers should do if a robotaxi malfunctions or behaves unexpectedly.

This omission raises a practical question: if you're removing brake pedals anyway, shouldn't this be the moment to develop a failsafe or emergency stop protocol for passengers? The NHTSA indicated it will "continue to consider this issue as it addresses ADS performance," essentially deferring the problem to a later date.

How Does This Affect the Robotaxi Race?

For robotaxi companies, this regulatory shift removes friction from the path to deployment. Companies no longer need to engineer brake pedals into vehicles designed to operate without human drivers, simplifying vehicle design and reducing manufacturing complexity. This particularly benefits companies like Waymo, which has already committed to fully driverless operations without safety monitors.

The broader implication is that regulators are actively reshaping vehicle standards to accommodate autonomous technology rather than forcing autonomous vehicles to conform to century-old automotive conventions. However, this approach prioritizes speed to market over establishing comprehensive safety protocols before those vehicles are widely deployed on public roads.

The NHTSA's initiative reflects a genuine modernization effort, but it also illustrates a regulatory philosophy that tackles barriers incrementally rather than comprehensively. Whether that approach adequately protects passengers and the public remains an open question as robotaxi fleets expand across American cities.