According to the Ioniq Guy on YouTube, Hyundai has just announced a service update that activates the brake lights based on deceleration rate. The update will be available in July, so a pretty quick response.
I think having lights turn on based on G-force is probably best. Even lightly applying the brakes (regardless of regen) might not need lights activated if I'm just dropping my speed a few mph to match traffic. I know I get annoyed when the brake lights of the EV in front of me come on briefly every 5 seconds because the person isn't great at one-pedal driving.
For the Ioniq 5, the brake lights supposedly do turn on for the higher levels of regenerative braking per https://youtu.be/G1rJNNKRzqY . I wonder if the discrepancy between these two results is different software for the North American market?
Going to have to do a test on my iq5 when traffic calms down..
Related: Can anyone recommend a Fediverse magazine for the Ioniq5?
Totally agreed. The GM solution of using g-force is interesting. And the Ioniq solution of letter-of-the-law, showing nothing even during intense regen deceleration is clearly not safe.
While we're re-thinking brake lights, it would be nice to add some other affordances too. It would be nice to have an indicator of intensity of braking/deceleration, not just a binary feedback.
For example, why not add some strobing lights to extremely hard braking (like the sort of braking you might do if you're on the highway and there's a massive collision right in front of you). Something that unambiguously signals "extreme danger, prepare to react" to the people behind you.
Or a brake light color or shape that indicates you're at a complete stop.
Or more generally, perhaps brake light intensity should be a graduated, dimmer brake lights for gentle braking and intense ones for rapid braking.
Tech enables a lot more options and information these days, it'd be nice to explore making some improvements. EV transition is a good time considering some of our expectations are changing anyways.
I have an ID4 and was concerned about the brake lights coming too. Still don't have one pedal but tested regen and acc with my wife following me. car activated brake lights every time
Since I had some bad surprises with some electric cars, I did a brake lights test as soon as I got my ID3. I asked someone to follow me. I phoned him and tried any way of braking on my ID3 (one pedal mode, regenerative braking, ACC, pedal braking). It works well on my ID3.
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