If you’ve never driven an electric vehicle, the term “one-pedal driving” might sound like a gimmick—or something out of a sci-fi movie. In reality, it’s one of the most intuitive and efficiency-boosting features of modern EVs. Here’s how it works.
The Basics of Regenerative Braking
At its core, one-pedal driving relies on regenerative braking, a system that converts kinetic energy back into stored electrical energy when the driver lifts off the accelerator. In a conventional car, slowing down wastes energy as heat through friction brakes. In an EV, that energy can be recaptured and used to extend driving range.
When you ease your foot off the pedal in one-pedal mode, the vehicle begins to decelerate—often quite sharply—without the driver ever touching the brake pedal. In many cases, the car can come to a complete stop, making it possible to drive in city traffic using only one pedal for both accelerating and braking.
Why Drivers Love It
There’s a reason one-pedal driving has become a beloved feature among EV enthusiasts:
- Improved efficiency: By maximizing energy recapture, drivers can often extend their range by 5–15% in stop-and-go traffic.
- Reduced brake wear: Less reliance on traditional friction brakes means lower maintenance costs over time.
- Enhanced driving experience: Many users find it more engaging and smoother than switching between two pedals.
But as with any technology, there are trade-offs—and that’s where regulators have begun to raise concerns.
Why China Is Changing the Rules
China’s updated GB 21670 standard isn’t an attack on innovation. Rather, it’s a response to growing evidence that one-pedal driving—especially as a default—may introduce new risks on the road.
Safety Studies and Driver Behavior
Several studies, including research from automotive safety institutes in Europe and China, have indicated that drivers using strong regenerative braking can become over-reliant on the system. In emergency situations, some drivers may delay pressing the physical brake pedal, relying instead on regeneration to slow down—even when maximum braking force is needed.
“The human factor is often the weakest link in vehicle safety. If a feature encourages delayed reaction times, it needs to be reconsidered.” — Dr. Li Wei, Beijing Automotive Safety Institute
This isn’t just theoretical. Real-world near-miss incidents and simulator studies have shown that drivers accustomed to one-pedal driving may exhibit slower brake response times in scenarios requiring sudden stops.
Alignment with Global Trends
China isn’t alone in reevaluating one-pedal interfaces. Porsche, for example, deliberately designed the Taycan’s regenerative braking to be integrated with the brake pedal rather than offering a standalone one-pedal mode. The company cited consistency with driver expectations and safety as key reasons.
Similarly, the European Union has been discussing standardizing brake light activation under regenerative deceleration—another measure included in China’s new rules.
Key Elements of the New Standard
GB 21670–2025 introduces several changes, to be rolled out in phases. Here’s what manufacturers—and eventually drivers—need to know.
Brake Light Illumination Requirements
Starting January 1, 2026, all new EVs sold in China must activate their brake lights when regenerative braking produces deceleration greater than 1.3 m/s². That’s roughly equivalent to easing off the accelerator in a Tesla on its highest regen setting. This ensures that drivers behind are aware when the vehicle is slowing significantly, even if the brake pedal isn’t being used.
Anti-Lock Braking Systems (ABS) Mandatory for All EVs
Another significant update requires all new electric vehicles to come equipped with ABS. While this has been standard in most markets for years, making it mandatory specifically for EVs underscores the importance of consistent braking performance—especially in low-traction scenarios where regenerative braking alone may be insufficient.
Default Setting Change (Effective 2027)
Come 2027, one-pedal driving can no longer be the default mode when a new EV is driven off the lot. Drivers can still enable it through the vehicle’s interface, but the initial setting must prioritize conventional two-pedal operation.
Pros and Cons of the Regulatory Shift
Like any policy, this one has its supporters and critics. Here’s a balanced look at the arguments.
Advantages
- Improved safety consistency: Reduces the risk of driver confusion or delayed reaction in emergencies.
- Clear signaling to other drivers: Brake light activation during strong regen improves communication on the road.
- Alignment with driver familiarity: New EV adopters may find the transition from gas cars smoother.
Disadvantages
- Reduced efficiency for unaware users: Drivers who don’t manually enable one-pedal mode may miss out on range benefits.
- Additional steps for enthusiasts: Those who prefer one-pedal driving will need to toggle it on—a minor inconvenience.
- Potential slowdown in adoption of efficient behaviors: If fewer people use regeneration optimally, overall energy efficiency could dip slightly.
What This Means for the Global EV Market
China is the world’s largest electric vehicle market, and its regulations often influence global standards. While automakers like Tesla, BYD, and NIO may need to tweak software defaults for the Chinese market, it’s possible that other regions could adopt similar rules—especially if safety data continues to suggest a need for caution.
We may also see more automakers following Porsche’s lead, integrating regeneration more seamlessly with traditional braking systems rather than treating it as a separate driving mode.
Conclusion
China’s move to adjust one-pedal driving settings isn’t a rejection of innovation—it’s a refinement of it. By placing safety and predictability ahead of convenience, regulators are acknowledging that new technology must earn driver trust through clarity and consistency. One-pedal driving isn’t going away. But going forward, it may become a choice rather than a presumption—and that’s not necessarily a bad thing.
Frequently Asked Questions
Is one-pedal driving being banned entirely?
No. The regulation only prevents it from being the default setting. Drivers can still enable and use it.
Will this affect existing EV owners?
No, the rules apply only to new vehicles manufactured after the implementation dates.
Do all EVs have one-pedal driving?
Not all, but most modern electric vehicles offer some form of strong regenerative braking. The implementation varies by brand and model.
Can I still use regenerative braking without one-pedal mode?
Yes. Many EVs offer adjustable regen settings or blend regeneration with traditional braking even without a dedicated one-pedal mode.
Will brake lights turn on during regenerative braking?
Yes, starting in 2026, if deceleration exceeds 1.3 m/s². This is already a feature in many current EVs.
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