Autopilot brake-checking HGVs in slow traffic

[Fursty Ferret]

Twice now I've had an unpleasant situation in slow traffic where Autopilot starts brake-checking HGVs that are close behind. There's nothing shown on the display to suggest that there's a reason for panic-braking, and it happens continually even with traffic in front a long way away.

Basically it'll stamp on the brake, and if you intervene with the accelerator and lift off again it'll do exactly the same thing. If you don't do anything it'll slow to about 5mph, then accelerate again to about 25 before repeating the hard stop.

The only consistent element is that both times an HGV has been following close behind. I don't know if this is confusing the cameras but it's worth keeping a very close eye on. Happens in both .28 and .36.

 

[yessuz]

Twice now I've had an unpleasant situation in slow traffic where Autopilot starts brake-checking HGVs that are close behind. There's nothing shown on the display to suggest that there's a reason for panic-braking, and it happens continually even with traffic in front a long way away.

Basically it'll stamp on the brake, and if you intervene with the accelerator and lift off again it'll do exactly the same thing. If you don't do anything it'll slow to about 5mph, then accelerate again to about 25 before repeating the hard stop.

The only consistent element is that both times an HGV has been following close behind. I don't know if this is confusing the cameras but it's worth keeping a very close eye on. Happens in both .28 and .36.

do you have cars infornt?

because that's how stupid vision rather than radars behaves, like "Is there a car? no. go go go.. oh sheet, there is car. brake! nope, no car - go go go"

 

[Adopado]

do you have cars infornt?

because that's how stupid vision rather than radars behaves, like "Is there a car? no. go go go.. oh sheet, there is car. brake! nope, no car - go go go"

OP said:

it happens continually even with traffic in front a long way away.

 

[Hellayella01]

Clean your cameras and make sure you are on the latest OTA update is the best you can do, otherwise you are pretty much experiencing what many others experience with the sub-par vision-only Autopilot.

 

[Mrklaw]

do you have cars infornt?

because that's how stupid vision rather than radars behaves, like "Is there a car? no. go go go.. oh sheet, there is car. brake! nope, no car - go go go"

hate this so much. In queuing traffic AP should be a god-send but its so violent I turn it off both for my comfort and avoiding frustrating people behind me.

Just use the ‘creep’ speed as the gap grows and then blend in from there. How hard can it be?

 

[yessuz]

hate this so much. In queuing traffic AP should be a god-send but its so violent I turn it off both for my comfort and avoiding frustrating people behind me.

Just use the ‘creep’ speed as the gap grows and then blend in from there. How hard can it be?

but but but zoom calls in your car!!!

 

[Ben_]

The risk of phantom braking on motorways or A-roads in traffic scares me, frankly. I wish I could trust the car implicitly, but I cannot. I can only assume that the driver of the car behind me assumes I’m just driving like an idiot, when the car decides it randomly needs to drop the anchors. Even a 5mph or 10mph lift makes a big difference to traffic when you’re on a busy motorway.

 

[Will_I_Make_It]

Every car I have driven recently with any "smart" cruise control has had phantom braking occur in congestion.. It is going to happen until the technology matures, if you don't like it, don't an early adopter. My Tesla has done it once to me already (just picked it up on Monday), it was a pleasant experience when you compare it to my 2018 Optima. It slams on the brake and locks up the emergency brake. When this happens I have to turn off the car and turn it back on to release the emergency brake. Imagine this happing when going 50 mph in SoCal traffic!

 

[Zilla91]

It is going to happen until the technology matures, if you don't like it, don't an early adopter.

Hate to break it to you but adaptive cruise control is already mature technical having been available in cars for well over a decade if not two.

 

[Will_I_Make_It]

Hate to break it to you but adaptive cruise control is already mature technical having been available in cars for well over a decade if not two.

Just because it has been out for a while, doesn’t necessarily mean it is mature.

 

[Zilla91]

Mate, it’s mature and works fine on everything other than a Tesla

 

[kavyboy]

Mate, it’s mature and works fine on everything other than a Tesla

Well, it works fine on Teslas with AP1, but I get what you're saying.

 

[Falcon22]

This feature works perfectly on my ioniq so it’s gonna be super frustrating if this is how it’s going to behave on my m3! And I can indicate, change lanes and it’ll stay on and speed back up my my set speed, it makes for very easy driving.

 

[speedyranger74]

Yesterday around 5pm on my way back home I stayed between 2 lorries on m62.

No issues