From 55 mph to a complete stop! Worst phantom braking. FSD Beta 10.12.2 - Reproducible with 2 different Tesla’s

[Luisito]

Autopilot will slow down from the 55mph speed limit and come to a complete aggressive stop in the middle of the road. I tested this with both FSD with Nav and without navigation on. This was duplicated on both our Model S Plaid and Model X.

I’m able to reproduce it every single time at the same location. It acts as if the road ends when it clearly does not. It occurs with vehicles behind me as well. I quickly take over. I have tested this multiple times. I allowed it to come to a complete stop on both our cars making sure no one was behind me.

I also tested on my son’s Model 3 and it works fine. Only difference is that our two cars have the beta FSD where he has the public non beta FSD. So it’s definitely beta that’s acting up.

Both on FSD Beta 10.12.2, Version 2022.12.3.20

I suspect it’s a mapping problem but I thought Tesla vision and sensors should clearly see that the road continues. I reported to Tesla. This has happened in the previous beta build as well.

 

[Supcom]

And the reason you're withholding the location, direction of travel, etc, is...?

 

[Dewg]

Autopilot will slow down from the 55mph speed limit and come to a complete aggressive stop in the middle of the road. I tested this with both FSD with Nav and without navigation on. This was duplicated on both our Model S Plaid and Model X.

I’m able to reproduce it every single time at the same location. It acts as if the road ends when it clearly does not. It occurs with vehicles behind me as well. I quickly take over. I have tested this multiple times. I allowed it to come to a complete stop on both our cars making sure no one was behind me.

I also tested on my son’s Model 3 and it works fine. Only difference is that our two cars have the beta FSD where he has the public non beta FSD. So it’s definitely beta that’s acting up.

Both on FSD Beta 10.12.2, Version 2022.12.3.20

I suspect it’s a mapping problem but I thought Tesla vision and sensors should clearly see that the road continues. I reported to Tesla. This has happened in the previous beta build as well.

Does the screen give any clue as to what the car is seeing at that moment? The new visualizations on FSD Beta may see something that your son's car doesn't see on the screen.

 

[Supcom]

Does the screen give any clue as to what the car is seeing at that moment? The new visualizations on FSD Beta may see something that your son's car doesn't see on the screen.

No mention of whether this is with beta vs NOA/AP active, either.

 

[Luisito]

No mention of whether this is with beta vs NOA/AP active, either.

Actually yes I did. ”I tested this with both FSD with Nav and without navigation on.”

Tested with NOA on and just AP on three different cars.

 

[Luisito]

Does the screen give any clue as to what the car is seeing at that moment? The new visualizations on FSD Beta may see something that your son's car doesn't see on the screen.

No indication on the screen whatsoever. I will record it with GoPro next time. I will post a video of it shortly.

 

[nvx1977]

is there a stop sign intended for a side street that is partially visible from the road you're on?

 

[Luisito]

And the reason you're withholding the location, direction of travel, etc, is...?

Here’s the location: Eastbound on FM 707 Abilene, Texas 55 mph road.

 

[RowdyMY]

Actually yes I did. ”I tested this with both FSD with Nav and without navigation on.”

Tested with NOA on and just AP on three different cars.

I think what they’re is asking is to to clarify if the vehicle was utilizing NoA logic or FSDb Logic. I have the same question, my assumption is you’re saying with the FSDb logic. NoA can still run on a car with the FSD Beta 10.12 firmware.

 

[RowdyMY]

What is the navigation database being utilized on all three of the cars you tested?

Are the 10.12 using a different DB than the 3?

 

[Tam]

...Autopilot will slow down...

Any message on the instrument cluster?

Does the posted road speed icon change to a lower number? Does your Maximum Cruise Speed change to a lower number too?

 

[Luisito]

is there a stop sign intended for a side street that is partially visible from the road you're on?

Nope. Just posted an aerial view with direction and location where it comes to a complete stop. This is with just autopilot on and not NOA.

Here’s a pic from the dash cam. It comes to a complete stop near the FM 707 sign on the left.

 

[Luisito]

What is the navigation database being utilized on all three of the cars you tested?

Are the 10.12 using a different DB than the 3?

Good question. All three cars are on NA-2020.48-12628.

 

[thewishmaster]

FWIW I have 3 different routes in my area that will cause this with FSD Beta 10.12.2 while in NoA / highway mode. In my case, it is reacting to a nonexistent stop sign. It will come to a stop behind the imaginary stop line if you don't intervene. Guessing it's the same issue for you. I've reported it and I take a snapshot every time. Hope 10.13 fixes it as this was not an issue on the same routes in the past.

 

[Luisito]

Any message on the instrument cluster?

Does the posted road speed icon change to a lower number? Does your Maximum Cruise Speed change to a lower number too?

No messages and posted speed limit on IC is 55 mph which it does pickup correctly about a half a mile prior. I suspect it’s a navigation map issue but even with NOA off it still wants to stop. I thought FSD beta is supposed to be using vision vs a mapping decision and with NOA off there should be no reason it wants to stop. I will upload video shortly.

 

[Luisito]

FWIW I have 3 different routes in my area that will cause this with FSD Beta 10.12.2 while in NoA / highway mode. In my case, it is reacting to a nonexistent stop sign. It will come to a stop behind the imaginary stop line if you don't intervene. Guessing it's the same issue for you. I've reported it and I take a snapshot every time

This road has never had a stop sign at this location.

 

[thewishmaster]

This road has never had a stop sign at this location.

Neither do the freeways where I see this out here. I am not sure the locations are aligned with any real stop signs either (eg road below the freeway) but I havent spent the time to investigate

 

[Dewg]

Good question. All three cars are on NA-2020.48-12628.

A little out of date on the mapping version. But that shouldn't cause a problem unless there is significant changes in the road structure.

Let's check the visualization next time you have the opportunity to try it safely.

 

[cbdream99]

Have you tried at different time during the day ?

 

[Supcom]

Maybe the car sees clay pigeons coming from the skeet range on the left...

Seriously, I Iooked at the google maps to see if there was a county or city boundary at that location. Although the city limit parallels the road to the south, it does not cross the road here. And the county line is well to the east. I have a highway near me where FSD slows way down right at a county line. Can't say if it would stop though.

The only thing is the other road merging in from the west. Your location is just after the merge with Spur 707, so maybe a mistaken right-of-way coding in the map?

It would be interesting to see if an M3 or MY with beta also stops here. Maybe someone else on TMC lives in Abilene, or is going to drive through there soon on I-20.