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Comment by warp

1 day ago

I have a Volkswagen ID3, I love the adaptive cruise control. Yes, it gets it wrong in some spots (signage isn't great here in Asturias, Spain), and it gets it wrong in both directions (too slow at certain locations, too fast in others).

But I still appreciate the convenience of not having to keep an eye on the speed nor the distance between the my car and the vehicles in front of me when driving on the freeway, where it generally doesn't make mistakes.

I have a CRV with adaptive cruise (USA) and while the car reads the speed limit signs it only uses them for display. There are instances where it misreads signs which is understandable because some of the road signs are very similar or the posted speed only applies to trucks ect.

But it does not adjust based on the reading, I manually set the speed but of course it'll slow down if there's a car in front. Automatically adjusting to the speed limit sounds insanely dangerous. It's very common place, at least in the US, to go 10 over the posted limit on controlled access highways, does the EU not operate in a similar mode?

  • In Germany: Outside of residential areas, about 10 km/h more for speedometer displaying too high + official speed trap tolerance, another 10 if you are willing to accept an occasional minor fine.

    Or more or less strictly on the limit to avoid stress and have a safety margin.

    The older I get, the more I pick the last option.

  • I've rented a 2026 Kia minivan this week for vacation and I can set a cruise control offset of -10 to +10 in steps of 5.(which is kind of funny in isolation, "how much do you want to break the law today?")

I drive a Nissan Ariya sometimes, which has adaptive cruise control. It's ... okay, but I'm not sure my own car's "dumb" cruise control is any worse to be honest.

My own car's cruise control is just three large buttons on the steering wheel: one which says "keep going this speed when I take my foot off the gas", one cancel button, and one "go back to the previous speed" button. It works wonders and is quite comfortable to use. Never messes up, I can rely on it 100% to do its one simple job.

The Ariya is much more fancy, but it's so much less reliable. If it's snowing outside it sometimes just randomly turns itself off because sensors got covered in snow, leading to a rapid deceleration until I intervene. Sometimes it refuses to turn on because sensors are covered in snow. And its braking curve is uncomfortable; when the car in front stops (e.g in stop and go traffic), it gets way close to the car in front and brakes hard, instead of slowly coming to a stop at a comfortable distance. Oh and it's connected to the nav system; I've had it just suddenly slow the car down to a crawl because the nav system had chosen a stupid route, it slowed down to take an exit while I stayed on the highway.

I'll take dumb but reliable any day over smart and unreliable. Even if it means I sometimes have to actually adjust speed myself.

Relatedly, I don't actually mind having to drive the car. I like cruise control because my foot gets fatigued when pressing the gas pedal for hours on end, but making manual adjustments to my speed? Changing gears? Listening to the engine to make sure it's at a happy RPM? I feel like that stuff just gives me small stuff to do so I keep paying attention to the driving.

The incessant beeping in modern cars on the other hand is just a distraction. Luckily, the Nissan lets you configure it so that 2 quick button presses on the steering wheel disables all the useless alarms. I'm so happy I don't have to do that manually for each "safety" feature every time I get in.

  • I hated it on my Toyota, but love it on the Honda Prologue (which is really a Chevy Blazer). On the Toyota it would drift down until I was following someone who I would normally have passed if I saw them coming. It would then race to catch up if I changed lanes. The Prologue gets closer before slowing, so I feel the approach and change lanes. It also has better behavior in traffic.

  • The stuff BMW ships is great. The ACC that I tried in a normal Toyota a few years ago was way worse. I'm a huge ACC fan but it really woke me up that I need to evaluate the vendors before I purchase the car.

But how is it convenient to not pay attention to actually driving?? That doesn't sound like a convenience - that sounds dangerous

  • Most of my driving is in and around the city I live in, so by now I've learned which spots it gets wrong, and where I can rely on it.

    Knowing I can just keep my eyes on the road and have the car make the speed limit changes for me feels more relaxing and safer, exactly because it's easier to pay attention to traffic if I don't have to look at the dashboard as often.

But you do have to keep an eye on those things. It can make the adjustments but you can't take your eye off them.