this post was submitted on 14 May 2026
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I can make it a good solid guess as to what happened there. They probably had adaptive cruise control running. For those who don’t know adaptive cruise control is it’s a sensor that will adjust your speed to perfectly match the speed of the person in front of you. If you are using cruise control. The problem is by default adaptive cruise control is set to the shortest distance possible. So it , from the person who is in front , from their perspective it looks like you are riding their ass. It should never be set to the shortest distance possible it should be set so you have about a three second following distance. Most people never adjust this because they’re stupid.
Now, why did they follow you when you change lanes? I’m going to call them a lemming. Well, the other person moved over so I’ll move over too. So as you slow down the adaptive cruise control makes them keep slowing down. And they’re not paying attention until like you said you get down about 30 miles an hour. Then they realize what’s going on.
Here’s the fun part when they pull out to go around you. If they speed up normally their engine doesn’t get gunned really hard. But if they just pull out, the adaptive cruise control kicks in and realize oh there’s nobody in front of me and I’m supposed to be going 80 mph. And the car will absolutely freaking gun it. It’ll go into overdrive. And if you aren’t prepared for that it’s quite the jolt.
And yeah they are basically goldfish and lemmings out there.
The particular case in my story didn't have a super recent car that could have adaptive cruise control (also, ime ACC is never set at the closest but default, but either the second or farthest setting), so they were definitely just driving terribly.
That’s interesting that your experiences that adaptive cruise control is never set to the closest. Every time I go to test driving new vehicle and when I say new, I mean very low miles like 15 miles or something. I checked the adaptive cruise control. It’s always set to the closest possible setting.