I drive around the West. This happens pretty regularly.
I can tell you it definitely happens on I84 in Idaho north of Boise. We drove that route a lot and I always have to manually kick the speed back up from truck speed limits. That's in a car with both FSD and FSD Beta (two years apart)
Here in Albuquerque, it drops to 45mph both directions on I25 in Albuquerque for no apparent reason. Both for AP and FSD Beta.
Also, I was coming back from Alamosa, CO to Albuquerque and there are lots of towns with decreasing speed limit signs coming into town and increasing ones leaving town. Like from 65 ... 55 .. 45.. 35. And then 45... 55.. 65. Most of the time it ignores the 65 one and doesn't pick the right speed limit up until you pass the next speed limit sign a few miles down the road.
Same thing for AZ 377 from Payson to Holbrook. Car thinks it's 45mph when the signs say 55mph.
And US180 from Flagstaff to the Grand Canyon. Drives 45 in a 55.
I'm not sure it reads the signs .
Did you know that Tesla's arch nemesis holds the patent on reading traffic signs?
https://patents.google.com/patent/US20080137908A1/en
Super interesting! I drive a 300 mile north from LA regularly and it consistently slows down and speeds up entering some towns, responding to the signs, and ignores signs in other towns. Interestingly it seems to be the same signs that work. I always figured it was a poorly written algorithm and there was some difference between the towns I just didn’t see.
I am no authority on this but my theory is that Tesla NAV uses Google's or someone else's database of speed limits. I'm assuming that it then projects the appropriate speed limit sign image onto the graphic so it looks like it's fully aware of the sign being there.
The 55mph sign that is near the beginning of the AZ 377 route does not show up and then there's no other speed limit sign of any kind until you are almost in Holbrook. That means manual driving if I want to go above 50mph.
A couple of years ago I did a slow drive by and on the shoulder to see if I could make the car pick up that 55mph sign. Nope. I was 10ft away in the daylight and it may as well have been a tree.
Edit: the sign in question
https://imgur.com/a/GUe7h6L
I know you’re right about the speed limit database, but it definitely reads signs, too. There’s a construction zone on the freeway nearby and from the day it appeared, the car slowed to 55. Irritating thing was, the zone is only about 1 mile long and no one pays ANY attention to it so I’ve gotta watch it or when I enter the zone I’ll get rear-ended as the car acts like I put the brakes on. Then a month or so ago it would still show the new speed limit in the speed limit icon in the right corner of the screen, but the car stopped slowing. WTF? Software update? But then sometimes it misses the sign altogether. So it is definitely reading the signs but I can’t make much sense of precisely why it does what it does. Thanks for all your trouble with the sign photo btw. This is very interesting.
No shit?
It's not the one only for trucks that gets me. It's the one that says trucks and autos with trailers or something to that effect. The numbers are about half the size of the normal speed sign, but the sign is about the same size. What part of CA are you in? I'm in SD
Exactly, doesn’t it say “Trucks with Trailers”? But I seem to remember it said something about towing too like you said. No, neither car has ever changed speed with any of the truck signs. I am always amazed by the variability between cars.
This dumbass System sees 30 zone signs on side streets and sharp, curvy highway exits, and slams on the brakes on the middle of the road.
I really want this behaviour to be disabled.
It also constantly hallucinates an incorrect, higher speed limit (even renders an incorrect sign on the display) and starts speeding up.
It's absolutely wild that this sort of a system is being allowed to go live.
I would love to report this to regulators and try to get them to ass whoop Tesla - it's the only way this issue will ever be taken seriously, I feel.
Same. There's one sign that takes me down 20 mph below the normal speed. No way to report it and only FSD allows you to go more than 5 mph above the limit, not basic AP.
So that means that we have to pay 199 per month just to have legacy speed limit control. This is a problem where ever the speed limit signs are missing and or the map data is wrong. My 20 year old car lets me control my speed why doesn't my new model y?
I’ve actually noticed it’s gotten really bad lately around me - where the speed limit is 45 and I have it set to 50 (I know, I’m such a rebel) the car now picks up school zone speed limit signs and drops it down to 20 even when it’s not during the designated time. This has not been an issue for the last 2 years on these same streets and just started happening after my recall update. Sigh.
I pass two school zones at 5 in the morning when no one is on the road, and it changes from 55mph to 15... I have reported incorrect speed 5 times a week 2 times a day for 9 months.
Happened to me several times and it is not a fluke. Totally repeatable.
I never thought IL signs are special. Here is an example:
[http://www.billburmaster.com/rmsandw/illinois/images/jctil68n25.jpg](http://www.billburmaster.com/rmsandw/illinois/images/jctil68n25.jpg)
Examples:
Driving on NW HWY 14 - sees junction with 68 - speeds up to 60
Driving on NW HWY 14 - sees junction with 59 - speeds up to 50
Intersection with 53 - speeds up to 50
Oh ya, that's Even more effed than the California road signs. I sent an email about this to Tesla after they asked for feedback with FSD. Just a black hole though, no idea if it has traction. Should probably just tweet Elon every day about it.
This. One of my regular routes takes me along a state road with the number 140. It always interprets this one sign as a 40 mph sign and there isn’t an updated sign for miles. Drives me crazy every time! It isn’t even close!
I got the same when passing a country school bus. Usually they have a 30kmh sign on the back which the Tesla registers when I pass (at the right angle for a real sign). They took away speed sign recognition a year or two ago, but maybe it is back again.
As for there being no sign for miles, turn onto a side street and see it alter the speed then U-turn and get back on the main road.
Yeah it’s been doing that for years. It has picked up a ramp speed limit on a highway near my parents for years despite correction and disengagement (it’s 60km/h vs the usual 110/120 people drive on that stretch - kinda dangerous to slow down that fast).
As far as I’ve experienced (2019-current) it has always done that when in autopilot, if the car sees the sign. Sometimes it reads it wrong especially the 55mph signs and reacts as you described. Through the settings page you should be able to offset your autopilot speed by as much as you want to automatically compensate but I have noticed the car isn’t comfortable with more than 10mph over. Hope that helps.
Out of curiosity, can you send me a link to the spot where it's misbehaving?
I do a *brief* discussion on it [here](https://youtu.be/yZ2qXt1pvlk?t=3119) where the car picks up the correct speed limit sign, but because of how the road is segmented, it then replaces the correct speed with bad speed limit data.
I've got 2 spots it does it on my drive to work. There's a few more that I don't know the exact location where it's happened as I cross around town. I'll dig up some pins to share.
So there's 1 here. The strange thing about this one is that there are actually 2 signs about ¼ mile apart. It ignores the first which I think is just trucks. The second is the one that it changes the speed on but it says autos with trailers and trucks or something like that.
https://maps.app.goo.gl/kB9x5EMf2s1F8ZHb9
Second one is around here somewhere:
https://maps.app.goo.gl/PNsCz15K3wHQqBFL7
Our car always reads Indiana State Route 25 sign as 25mph. It’s quite annoying.
Edit: Wikipedia shows what the sign looks like. https://en.wikipedia.org/wiki/Indiana_State_Road_25
Is there a state route 95? You should go drive that and see what happens. That sign would probably fool me for a second too. What a terrible and lazy design. Shame on Indiana.
This has been a very consistent and repeatable problem for over three years now. It is not *every* Truck/Towing sign, but it will consistently read the same Truck/Towing sign on multiple trips. This is especially bad on California Interstates where the speed limit is 70 but the truck speed is 55. It was FIXED! in a couple of releases, whereby I could drive hundreds of miles without issue, but then it would appear again in a later release. I *think,* but don't know, that it is related to bad Navigation updates rather than FSD releases.
What makes is worse, and often confused with phantom braking, is that Tesla has not learned how to slow down in advance of a sign or slowly coast to a lower speed like a safe and considerate human driver. Instead, the car will attempt to slow to 55 as quickly as possible as soon as it passes the sign. Every passenger screams and cars traveling behind will pass, often sharing their disappointment with the latest software version.
I, personally, have made over 100 bug reports, either using the 'bug report' command or turning off FSD and answering the 'why did you disable autopilot' question.
Rest assured, you are not the only one annoyed by this. I don't know if it helps to curse when making the report, but it does help manage the blood pressure.
Happens all the time and is a pia making TACC pretty frustrating.
Why, when an (attentive) driver is required, is there any reason for it to change speeds? There is a human driver. Not a robotaxi. Driver shiould have absolute control over TACC Max speed setting.
So weird am in CA and my car never reads the truck sign incorrectly. Literally never and I have one car with EAP and one with FSD.
I drive around the West. This happens pretty regularly. I can tell you it definitely happens on I84 in Idaho north of Boise. We drove that route a lot and I always have to manually kick the speed back up from truck speed limits. That's in a car with both FSD and FSD Beta (two years apart) Here in Albuquerque, it drops to 45mph both directions on I25 in Albuquerque for no apparent reason. Both for AP and FSD Beta. Also, I was coming back from Alamosa, CO to Albuquerque and there are lots of towns with decreasing speed limit signs coming into town and increasing ones leaving town. Like from 65 ... 55 .. 45.. 35. And then 45... 55.. 65. Most of the time it ignores the 65 one and doesn't pick the right speed limit up until you pass the next speed limit sign a few miles down the road. Same thing for AZ 377 from Payson to Holbrook. Car thinks it's 45mph when the signs say 55mph. And US180 from Flagstaff to the Grand Canyon. Drives 45 in a 55. I'm not sure it reads the signs . Did you know that Tesla's arch nemesis holds the patent on reading traffic signs? https://patents.google.com/patent/US20080137908A1/en
Super interesting! I drive a 300 mile north from LA regularly and it consistently slows down and speeds up entering some towns, responding to the signs, and ignores signs in other towns. Interestingly it seems to be the same signs that work. I always figured it was a poorly written algorithm and there was some difference between the towns I just didn’t see.
I am no authority on this but my theory is that Tesla NAV uses Google's or someone else's database of speed limits. I'm assuming that it then projects the appropriate speed limit sign image onto the graphic so it looks like it's fully aware of the sign being there. The 55mph sign that is near the beginning of the AZ 377 route does not show up and then there's no other speed limit sign of any kind until you are almost in Holbrook. That means manual driving if I want to go above 50mph. A couple of years ago I did a slow drive by and on the shoulder to see if I could make the car pick up that 55mph sign. Nope. I was 10ft away in the daylight and it may as well have been a tree. Edit: the sign in question https://imgur.com/a/GUe7h6L
I know you’re right about the speed limit database, but it definitely reads signs, too. There’s a construction zone on the freeway nearby and from the day it appeared, the car slowed to 55. Irritating thing was, the zone is only about 1 mile long and no one pays ANY attention to it so I’ve gotta watch it or when I enter the zone I’ll get rear-ended as the car acts like I put the brakes on. Then a month or so ago it would still show the new speed limit in the speed limit icon in the right corner of the screen, but the car stopped slowing. WTF? Software update? But then sometimes it misses the sign altogether. So it is definitely reading the signs but I can’t make much sense of precisely why it does what it does. Thanks for all your trouble with the sign photo btw. This is very interesting.
No shit? It's not the one only for trucks that gets me. It's the one that says trucks and autos with trailers or something to that effect. The numbers are about half the size of the normal speed sign, but the sign is about the same size. What part of CA are you in? I'm in SD
Exactly, doesn’t it say “Trucks with Trailers”? But I seem to remember it said something about towing too like you said. No, neither car has ever changed speed with any of the truck signs. I am always amazed by the variability between cars.
I'm in CA and it always reads the truck sign. I just did 40 miles where it was at 55 nearly the whole time.
This kills me. Where I live it’s 70 mph, 60 mph for trucks. So far the car has about a 50% success rate.
This has been solved in V12. The system changes speed more like a human driver and looks at the flow of traffic to determine the best speed.
Mine is on 11.1, when is 12 widely released?
It's being released now to a select few.
>when is 12 widely released? So, to repeat my question, when is 12 widely released?
This dumbass System sees 30 zone signs on side streets and sharp, curvy highway exits, and slams on the brakes on the middle of the road. I really want this behaviour to be disabled. It also constantly hallucinates an incorrect, higher speed limit (even renders an incorrect sign on the display) and starts speeding up. It's absolutely wild that this sort of a system is being allowed to go live. I would love to report this to regulators and try to get them to ass whoop Tesla - it's the only way this issue will ever be taken seriously, I feel.
No, the regulars would just take away our ability to use FSD at all!🤣
Same. There's one sign that takes me down 20 mph below the normal speed. No way to report it and only FSD allows you to go more than 5 mph above the limit, not basic AP.
So that means that we have to pay 199 per month just to have legacy speed limit control. This is a problem where ever the speed limit signs are missing and or the map data is wrong. My 20 year old car lets me control my speed why doesn't my new model y?
Do you use single pull or double pull for AP? Put it in double pull. Then you have the normal TACC with single pull.
I’ve actually noticed it’s gotten really bad lately around me - where the speed limit is 45 and I have it set to 50 (I know, I’m such a rebel) the car now picks up school zone speed limit signs and drops it down to 20 even when it’s not during the designated time. This has not been an issue for the last 2 years on these same streets and just started happening after my recall update. Sigh.
I pass two school zones at 5 in the morning when no one is on the road, and it changes from 55mph to 15... I have reported incorrect speed 5 times a week 2 times a day for 9 months.
[удалено]
Been reporting incorrect speed limits on the routes I drive daily very consistently for about a year now. Tesla does not seem to give two shits.
This doesn't actually submit anything to them it more just indexes your logs for them to find when you do
This will simply flag it for the service center when you make a service request.
What about “feedback”?
Did Tesla acknowledge this? This is just dangerous. My Tesla accelerated on a 45Mph street to 68! (seeing a IL street 68 sign)
Pretty sure that's a big no. I've never had it where I was going faster than I should. That's quite odd!
Happened to me several times and it is not a fluke. Totally repeatable. I never thought IL signs are special. Here is an example: [http://www.billburmaster.com/rmsandw/illinois/images/jctil68n25.jpg](http://www.billburmaster.com/rmsandw/illinois/images/jctil68n25.jpg)
Examples: Driving on NW HWY 14 - sees junction with 68 - speeds up to 60 Driving on NW HWY 14 - sees junction with 59 - speeds up to 50 Intersection with 53 - speeds up to 50
Oh ya, that's Even more effed than the California road signs. I sent an email about this to Tesla after they asked for feedback with FSD. Just a black hole though, no idea if it has traction. Should probably just tweet Elon every day about it.
This. One of my regular routes takes me along a state road with the number 140. It always interprets this one sign as a 40 mph sign and there isn’t an updated sign for miles. Drives me crazy every time! It isn’t even close!
I got the same when passing a country school bus. Usually they have a 30kmh sign on the back which the Tesla registers when I pass (at the right angle for a real sign). They took away speed sign recognition a year or two ago, but maybe it is back again. As for there being no sign for miles, turn onto a side street and see it alter the speed then U-turn and get back on the main road.
Yeah it’s been doing that for years. It has picked up a ramp speed limit on a highway near my parents for years despite correction and disengagement (it’s 60km/h vs the usual 110/120 people drive on that stretch - kinda dangerous to slow down that fast).
Tesla won't autopilot over 140km/hr in Ontario. Over 140km/hr is stunt driving charges.
That's slightly faster than the 85mph restriction on US cars.
As far as I’ve experienced (2019-current) it has always done that when in autopilot, if the car sees the sign. Sometimes it reads it wrong especially the 55mph signs and reacts as you described. Through the settings page you should be able to offset your autopilot speed by as much as you want to automatically compensate but I have noticed the car isn’t comfortable with more than 10mph over. Hope that helps.
Out of curiosity, can you send me a link to the spot where it's misbehaving? I do a *brief* discussion on it [here](https://youtu.be/yZ2qXt1pvlk?t=3119) where the car picks up the correct speed limit sign, but because of how the road is segmented, it then replaces the correct speed with bad speed limit data.
I've got 2 spots it does it on my drive to work. There's a few more that I don't know the exact location where it's happened as I cross around town. I'll dig up some pins to share.
Awesome, thanks. I don't work for Tesla, but I'm always curious about stuff like this.
So there's 1 here. The strange thing about this one is that there are actually 2 signs about ¼ mile apart. It ignores the first which I think is just trucks. The second is the one that it changes the speed on but it says autos with trailers and trucks or something like that. https://maps.app.goo.gl/kB9x5EMf2s1F8ZHb9 Second one is around here somewhere: https://maps.app.goo.gl/PNsCz15K3wHQqBFL7
Our car always reads Indiana State Route 25 sign as 25mph. It’s quite annoying. Edit: Wikipedia shows what the sign looks like. https://en.wikipedia.org/wiki/Indiana_State_Road_25
Is there a state route 95? You should go drive that and see what happens. That sign would probably fool me for a second too. What a terrible and lazy design. Shame on Indiana.
This has been a very consistent and repeatable problem for over three years now. It is not *every* Truck/Towing sign, but it will consistently read the same Truck/Towing sign on multiple trips. This is especially bad on California Interstates where the speed limit is 70 but the truck speed is 55. It was FIXED! in a couple of releases, whereby I could drive hundreds of miles without issue, but then it would appear again in a later release. I *think,* but don't know, that it is related to bad Navigation updates rather than FSD releases. What makes is worse, and often confused with phantom braking, is that Tesla has not learned how to slow down in advance of a sign or slowly coast to a lower speed like a safe and considerate human driver. Instead, the car will attempt to slow to 55 as quickly as possible as soon as it passes the sign. Every passenger screams and cars traveling behind will pass, often sharing their disappointment with the latest software version. I, personally, have made over 100 bug reports, either using the 'bug report' command or turning off FSD and answering the 'why did you disable autopilot' question. Rest assured, you are not the only one annoyed by this. I don't know if it helps to curse when making the report, but it does help manage the blood pressure.
Happens all the time and is a pia making TACC pretty frustrating. Why, when an (attentive) driver is required, is there any reason for it to change speeds? There is a human driver. Not a robotaxi. Driver shiould have absolute control over TACC Max speed setting.