Micro brakes when cars pass or when using lane change

[ramonneke]

I very often have micro brakes. Really subtle short speed reductions. This sometimes happen when cars pass me. I would say that it happens when the B pillar forward facing camera sees the vehicle.
It almost happens always when using assisted lane change and there is a car behind you in the lane you want to move to and actually is driving SLOWER.

Do others experience this too?

 

[ramonneke]

Typo in question text but I cannot edit the text

 

[S4WRXTTCS]

I can't say I've experienced Microbraking when being passed, but I've definitely had the slowing while doing an auto-lane change.

It's really consistent in that I lose 1-2mph with NO CARS in front of me.

 

[Mike Robinson]

I’ve had it happen when a car in the lane next to me gets too close

 

[mrbulk]

Me too, just noticed this today on freeway, although do not recall definitely When it occurs.

 

[ewoodrick]

How much does the speedometer drop?

There are some optical illusions that occur when two moving cars pass each other. This is why people tend to speed up as you pass them, they think they are going slower than they are.

 

[ArbitrageMan]

Mine does it when going under a sign or overpass on the highway. On my commute home Ive found the spots that trip it up.

 

[mrbulk]

Mine does it when going under a sign or overpass on the highway. On my commute home Ive found the spots that trip it up.

I always had major braking at this one freeway overpass, every time, but now it just kinda "taps the brakes" down a couple mph like its checking it out but then continues on, and speed inches back up after. So at this one geographical point at least, it is indeed better than before, for me anyway.

Come to think of it I know several other owners here locally that have commented on that same overpass, I'll have to see what versions they have and if it changed anything.

 

[ramonneke]

How much does the speedometer drop?

Just 1 to 3 kilometers, it isn't braking hard but you feel it in your body. Really unpleasant IMHO.

 

[ramonneke]

Mine does it when going under a sign or overpass on the highway. On my commute home Ive found the spots that trip it up.

That is called "phantom braking" and that isn't really a micro brake . Phanton breaks but sometimes like a emergency like brake incident and you are glad that you are wearing seatbelts ;-)

 

[mrkisskiss]

I’ve got this really badly on 19.4.3

It makes autopilot nearly unusable. It happens when a car on your left (in the UK) gets a little bit close to the lane lines, or starts to approach the lane line. It’s terrible when you’re in the fast lane, as it brakes when you’re overtaking a car.

I assume this is to do with the ‘allow a car to cut in’ logic they’re testing. But, it’ll just get me rear ended or in some road rage incident. Did a 400 mile drive at the weekend... I’ve done it before almost all on AP. This time, I seriously tried, but I ended up just disabling AP for the trip as it was too dangerous. Shame.

I’m hoping for an update soon.

 

[MNoICE618]

I experience this when there are undulations in the road. At 60kmh. It’s like driving an ice car with fuel flow issues- the drive is jerky. Not even auto pilot - just using cruise control.

Cruise control occasionally slams the brakes on when going past a parked car - I wish there was a “dumb” cruise control. Just keep the speed I set thanks.

 

[Feathermerchan]

I have the 'dumb' cruise control. It is included when you don't buy Autopilot. I had the Autopilot free trial, and did not like it. I also experienced the micro braking. It can also happen when the person you are following can't maintain a steady speed. It can make you a little car sick. The micro braking may occur when the car sees undulations in the pavement and somehow thinks they are cars or other objects for a second.

 

[rsg123]

“Micro braking” happens to me on the freeway when passing by the same two offramp exits, one on either direction of my commute. They are in different cities. I have patiently been waiting for a software update to fix it for 1.5 years, but sadly with AP1 I’m no longer holding by breath.

 

[ramonneke]

Cruise control occasionally slams the brakes on when going past a parked car - I wish there was a “dumb” cruise control. Just keep the speed I set thanks.

YES! TACC doesn't work off the highways. So many times that an approaching car results in the brake to be slammed when the car is about to pass you and TACC probably thinking that it might hit the car. Not as strong as some phantom braking incidents at viaducts but super super uncomfortable, and especially for any other people in the car.

The problem is that you cannot really see this in the dashcam footage unless you also have a camera recording the cockpit.

 

[Mike Robinson]

That is called "phantom braking" and that isn't really a micro brake . Phanton breaks but sometimes like a emergency like brake incident and you are glad that you are wearing seatbelts ;-)

Do the brake lights come on during “phantom braking”?

 

[diamonds2]

I’ve got this really badly on 19.4.3

It makes autopilot nearly unusable. It happens when a car on your left (in the UK) gets a little bit close to the lane lines, or starts to approach the lane line. It’s terrible when you’re in the fast lane, as it brakes when you’re overtaking a car.

I’m hoping for an update soon.

I had all the issues mentioned in this thread. It started for me with 2019.4.2. I got the SC to push me an update. A couple of hours later I had 2019.4.3, no better.
Then a few weeks later I received 2019.8.5, maybe a little better .
I just got a notice from the app that there is an update that's staged. I'm going to install it and see how the ride home from work is.

 

[BIGAAPL]

Ever since the last update it happens a lot in my S. Makes autopilot nauseating. Very annoying and needs to be fixed ASAP.

 

[Cloxxki]

Mine does it when going under a sign or overpass on the highway. On my commute home Ive found the spots that trip it up.

Have you logged those with Tesla as bugs? Much hype about machine learning but consistent hickups seem to point to no such thing as machine learning, at least between version updates.

 

[ArbitrageMan]

Have you logged those with Tesla as bugs? Much hype about machine learning but consistent hickups seem to point to no such thing as machine learning, at least between version updates.

How do I do that?

(The places are on the DC beltway, so zillions if Teslas must pass by every day)