Does the car "read" the speed limit signs?

[Trevor B]

I thought it was GPS based and not by the reading the signs.

But then I saw this: Tesla Autopilot gets tricked into accelerating from 35 to 85 mph with modified speed limit sign - Electrek

 

[cucubits]

I thought it was GPS based and not by the reading the signs.

But then I saw this: Tesla Autopilot gets tricked into accelerating from 35 to 85 mph with modified speed limit sign - Electrek

So far only the Model S with AP1 (mobileye) reads actual traffic signs. All others are still GPS based as far as I know.

 

[Trips]

So far only the Model S with AP1 (mobileye) reads actual traffic signs. All others are still GPS based as far as I know.

Yes, along with some original Model X's with hardware 1. This was from Mobileye that owns the patent on a camera being able to read a speed limit. Tesla will either need to license this or create a different way of reading a speed limit.

 

[DirtyT3sla]

Make sure to look into the article more next time. This was an old model S with Mobile Eye cameras (AP1) as others have said. This is how misinformation is spread - damn blogs writing vague headlines.

So it's not even fully Tesla's system. It's someone else's system in a Tesla vehicle.

 

[kkillebrew]

Not after 2016 and the split with MobilEye. it is GPS based, the Tesla in question used MobilEye

 

[milosmaill]

I thought it was GPS based and not by the reading the signs.

But then I saw this: Tesla Autopilot gets tricked into accelerating from 35 to 85 mph with modified speed limit sign - Electrek

Google includees metadata in the app

 

[milosmaill]

Google maps include metadata (which you can't see) including posted speed limit.

 

[Stars_Fan]

It's pretty crap that Tesla isn't doing that. My Honda Accord I'm trading in does traffic sign recognization and puts it in the hud.

 

[Kevy Baby]

It's pretty crap that Tesla isn't doing that. My Honda Accord I'm trading in does traffic sign recognization and puts it in the hud.

I'm glad it doesn't - if for no other reason than the what the linked article in the OP talked about.

 

[JulienW]

It's pretty crap that Tesla isn't doing that. My Honda Accord I'm trading in does traffic sign recognization and puts it in the hud.

Because it uses Moblieye and they have patents on reading speed signs with a camera. Tesla is working to find a legal way around this.

 

[fasteddie7]

This has been a thing for a few versions as this happened with a tree branch across sign.

 

[LCR1]

AP1 cars read the signs, which is actually annoying in school zones because I'm moving along at 45-55mph and all of a sudden the car stabs the brakes to bring me down to 20-25; great when it's actually that time but sucks the other 22 hours in the day. Do AP2+ cars also do this in school zones?

 

[Big Earl]

AP1 cars read the signs, which is actually annoying in school zones because I'm moving along at 45-55mph and all of a sudden the car stabs the brakes to bring me down to 20-25; great when it's actually that time but sucks the other 22 hours in the day. Do AP2+ cars also do this in school zones?

No because AP2 doesn't read speed limit signs.

 

[Birdman325]

This story seems to have been picked up - I heard it several times on the news today "A simple piece of tape can defeat the smartest driving computer on the planet in Tesla cars!"

 

[LCR1]

No because AP2 doesn't read speed limit signs.

So the car just goes along at whatever the GPS database says it is for that road?

 

[Big Earl]

So the car just goes along at whatever the GPS database says it is for that road?

Yep. As you'd expect, there are errors in the database, which is about as annoying as school zones with AP1.

 

[Kevy Baby]

So the car just goes along at whatever the GPS database says it is for that road?

Yep. As you'd expect, there are errors in the database, which is about as annoying as school zones with AP1.

A road that I take twice daily as part of my commute has the speed limit on the database as 40 MPH one way and 50 MPH the other (it is posted at 40 MPH both directions). I always have to turn AP down on the 50 MPH side.

Neither way is perfect but if I had to choose just one or the other, I would go with database as reading signs is too subjective to outside factors such as trees and vandalism as mentioned as well as vehicles blocking the sign, etc.

Haven't experienced the school zone factor @LCR1 and @Big Earl are mentioning

 

[brkaus]

This story seems to have been picked up - I heard it several times on the news today "A simple piece of tape can defeat the smartest driving computer on the planet in Tesla cars!"

Exactly. Which is part why Tesla moved from MobileEye I would guess.

 

[SVMike]

This was from Mobileye that owns the patent on a camera being able to read a speed limit.

Probably better stated as "Mobileye that owns a patent on a camera being able to read a speed limit."

There are numerous ways to do this, many open source.

Traffic-sign recognition - Wikipedia

 

[Knightshade]

Exactly. Which is part why Tesla moved from MobileEye I would guess.

The really really short version is Elon wanted FSD, totally done, really fast... and Mobileye said "Yeah, there's no remotely safe or reasonable way to do that anytime soon" and it kinda escalated from there into a messy breakup that left AP1 cars largely abandoned for significant further updating (in part because Tesla never had access to substantial parts of the system only mobileye did), and meant it'd be a couple years before Tesla internally was able to get AP2 caught back up to where AP1 already was...and still years behind Elons intended target dates from back when the breakup happened (though it's reasonably far ahead of AP1 nowadays in most circumstances at least)