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Speed Sign Recognition for Cruise Control - Anyone Still Having Issues? (UK users in particular)

JohnG

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My Macan 4S is absolutely hopeless, it indicates 30 mph randomly and totally ignores roadside speed signs. I had the car back to the dealer last week for the latest update and they were hopeful that this would solve the problem - but it didn’t! - and it took them 3 1/2 hours to achieve that!
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flowerman

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In our area several of the roads have changed speed limits recently. Seems that the car still seems to remember and show some of the old speed limits. Makes me wonder if the feature uses a combination of gps map knowledge and visual sign detection?
 

MVO

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I had this issue with a 2019 E-TRON on down hill grades, the car would read the 35 MPH speed limit sign for large trucks and drop my speed from 65 to 35. The main concern was the possibility of road rage. The system never misread numbers but it was always not set to control anything after the first time.
 
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SuperH

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I had this issue with a 2019 E-TRON on down hill grades, the car would read the 35 MPH speed limit sign for large trucks and drop my speed from 65 to 35. The main concern was the possibility of road rage. The system never misread numbers but it was always not set to control anything after the first time.
My previous car was the 2020 e-tron Sportback launch edition, and I really miss the assistance systems on it (particularly the wing cams and the 16 surround cameras which were never an option with Porsche anyway). Never had any major or regular issues and it was that car's systems (mainly the speed sign recognition and the topography based breaking which supposedly are available with Porsche) that prompted me to add Innodrive as a cost as I wanted the same on the Macan. Alas, neither work.
 

alxman

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I have noticed better correlation with the speed when using Apple Maps as opposed to the native system. I suspect Apple Maps bases it on visualization of the speed signs but also maps database (more current?) while Porsche bases it on visualizing the speed signs which are sometimes lacking or not clearly visible.
 


PrudentOcean

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I have noticed better correlation with the speed when using Apple Maps as opposed to the native system. I suspect Apple Maps bases it on visualization of the speed signs but also maps database (more current?) while Porsche bases it on visualizing the speed signs which are sometimes lacking or not clearly visible.
I doubt that there is any correlation. The car doesn’t rely on third party information for speed limits, it uses Porsche’s navigation database and the car’s cameras for sign recognition.
 

MVO

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My previous car was the 2020 e-tron Sportback launch edition, and I really miss the assistance systems on it (particularly the wing cams and the 16 surround cameras which were never an option with Porsche anyway). Never had any major or regular issues and it was that car's systems (mainly the speed sign recognition and the topography based breaking which supposedly are available with Porsche) that prompted me to add Innodrive as a cost as I wanted the same on the Macan. Alas, neither work.
I was also counting on the Audi and Porsche, being VW products to result in the new Porsche being as good as, or better than the Audi performance. I wanted the 800 volt charging speed, and the improved range, and to get my drive to a dealer lower than 140 miles, ( now 19 miles). And the 0 to 60 mph is a delight. If I tell people I have to drive my new Porsche myself, I can expect no sympathy.
 

craz8

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In the USA, the speed sign detection has been about 98% for me.

We have these signs in my area for variable speeds. 30mph usually, with a 20mph limit when an orange light is flashing. School zones use these during the day when necessary.

These display as '20' with a yellow banner on top of the square sign, even if the limit is 30, when the light isn't flashing.

Today I went through one of these (that I regularly pass) that DID have the light flashing, and it was ignored entirely, showing me 30 the entire time!

So, for these, it displays low when it should be the high number, and high when it should be the low number!

There are also times where slow roads next to freeways cause confusion - reading 15 instead of 60 or 70 is a big deal.

Although not as broken as the UK, in the USA, this has enough errors to not be useable for automated speed control.

Two other weird things:

1. I've had the HUD and the main display show different signs at the same time!
2. During a recent trip on undulating roads, several times, the display would drop from 60 to 25 at the bottom of these undulations without any roadside signage visible.
 

PrudentOcean

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I went through a construction zone today with temporarily changed traffic patterns etc. where the speed limit first drops from 50 to 40, and then from 40 to 30. I could see the recognized speed limit change in the HUD as soon as I passed each of the signs.

I would never let the car limit the vehicle speed in cruise control based on the recognized speed limit, but that has nothing to do with the speed limit recognition not working well enough for that purpose.
 
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Uk Turbo here and from reading this thread I'm only now realising its meant to be reading road signs with the camera! Absolutely useless on mine the speed limit displayed in the HUD is incorrect 75% of the time. Can't trust it at all. Been back to dealer for the April update which made it better so its only wrong 60% of the time now. But still does more harm than good.
Can't say I'm impressed with the software on this car at all. Passenger display keeps locking on stby mode so you can't use it at all, heated and cooled seats switch on/off at complete random, and charging is a lottery normally takes 2 or 3 attempts to get any charger to communicate successfully with the car.
I have put down a deposit on a build slot for the new Cayene EV Turbo which is expected late 2026/27 but I think this week I'm going get that refunded.
The drive of this car is outstanding but living with it day to day is just frustrating which for £129k should be unimaginable.
 


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SuperH

SuperH

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I was also counting on the Audi and Porsche, being VW products to result in the new Porsche being as good as, or better than the Audi performance. I wanted the 800 volt charging speed, and the improved range, and to get my drive to a dealer lower than 140 miles, ( now 19 miles). And the 0 to 60 mph is a delight. If I tell people I have to drive my new Porsche myself, I can expect no sympathy.
🤣 It’s not so much expecting my car to drive itself - it’s expecting the paid for extras that assist my often long distance driving to work both effectively and safely. Unfortunately it does neither of those things. If you yourself had paid for an extra I would assume that a) you paid for it because it brings a personal benefit to your driving style or additional safety preferences and b) having paid for it you expect it to work. Particularly when the cost was not insubstantial when considered against the full range of extras available.

Wouldn’t you expect someone to complain if say the Rear Wheel Steering had been purchased but didn’t work?

Aside from that, yes, 0-60 is most definitely a delight 😃 As is the rear wheel steering which assist me getting onto my tight driveway.
 
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SuperH

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In the USA, the speed sign detection has been about 98% for me.

We have these signs in my area for variable speeds. 30mph usually, with a 20mph limit when an orange light is flashing. School zones use these during the day when necessary.

These display as '20' with a yellow banner on top of the square sign, even if the limit is 30, when the light isn't flashing.

Today I went through one of these (that I regularly pass) that DID have the light flashing, and it was ignored entirely, showing me 30 the entire time!

So, for these, it displays low when it should be the high number, and high when it should be the low number!

There are also times where slow roads next to freeways cause confusion - reading 15 instead of 60 or 70 is a big deal.

Although not as broken as the UK, in the USA, this has enough errors to not be useable for automated speed control.

Two other weird things:

1. I've had the HUD and the main display show different signs at the same time!
2. During a recent trip on undulating roads, several times, the display would drop from 60 to 25 at the bottom of these undulations without any roadside signage visible.
I wonder if point 2 of your observations is due to the road topography being turned on?
 
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SuperH

SuperH

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Uk Turbo here and from reading this thread I'm only now realising its meant to be reading road signs with the camera! Absolutely useless on mine the speed limit displayed in the HUD is incorrect 75% of the time. Can't trust it at all. Been back to dealer for the April update which made it better so its only wrong 60% of the time now. But still does more harm than good.
Can't say I'm impressed with the software on this car at all. Passenger display keeps locking on stby mode so you can't use it at all, heated and cooled seats switch on/off at complete random, and charging is a lottery normally takes 2 or 3 attempts to get any charger to communicate successfully with the car.
I have put down a deposit on a build slot for the new Cayene EV Turbo which is expected late 2026/27 but I think this week I'm going get that refunded.
The drive of this car is outstanding but living with it day to day is just frustrating which for £129k should be unimaginable.
Blimey - it does sound like you’ve got a lot of niggles! I’ve not had it as bad as that list - just a sometimes temperamental charging cover; at one point the front windows would randomly drop half way then keep bouncing open when I tried to close them (others on here have reported the same but it seems to have resolved itself for me at least); the impact warning alert on the dashboard has a mind of its own even with the sensor turned low (also common, thankfully the car doesn’t try an emergency stop); and the frunk sensor is temperamental (also common); then the cruise control. I have some frustrations that I now know are just Porsche standard spec - such as why does the full beam headlights only automatically come on at 40mph, which is useless on country lanes and I have to manually do them; why doesn’t the sport sound stay on whatever you set it to, instead of needing to turn it on every time I get in the car…

The latter are ‘first world issues’ I know, but like you say - for an expensive car the cost needs to be justified by the daily driving experience, and for me that’s borderline at best. I can drive fast in a top of the range e-tron, which is what I’ve currently ear-marked for my replacement to the Macan in three years time.
 

W1NGE

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Uk Turbo here and from reading this thread I'm only now realising its meant to be reading road signs with the camera! Absolutely useless on mine the speed limit displayed in the HUD is incorrect 75% of the time. Can't trust it at all. Been back to dealer for the April update which made it better so its only wrong 60% of the time now. But still does more harm than good.
Can't say I'm impressed with the software on this car at all. Passenger display keeps locking on stby mode so you can't use it at all, heated and cooled seats switch on/off at complete random, and charging is a lottery normally takes 2 or 3 attempts to get any charger to communicate successfully with the car.
I have put down a deposit on a build slot for the new Cayene EV Turbo which is expected late 2026/27 but I think this week I'm going get that refunded.
The drive of this car is outstanding but living with it day to day is just frustrating which for £129k should be unimaginable.
How can you place a deposit for a car which is not yet guaranteed to surface or be available.

Reservation / note of interest fee is not the same as a build slot which can only be placed upon launch of the vehicle (been there done that several times with Porsche). Build slots are much more expensive than a note of interest, how.kuch did you put down out of interest?

The base Macan EV will demonstrate the same issues at considerably less £ than a highly option Turbo variant.

Camera recognition is one piece of the puzzle - mapping data the other which is invariably incorrect and not controlled by Porsche.
 

Greg McD

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My Macan 4S is absolutely hopeless, it indicates 30 mph randomly and totally ignores roadside speed signs. I had the car back to the dealer last week for the latest update and they were hopeful that this would solve the problem - but it didn’t! - and it took them 3 1/2 hours to achieve that!
I have had few troubles with speed sign recognition which has been 95% accurate. The problem I do have is that with cruise control on a multilane highway it will not allow me to pass a vehicle in the outside lane (so I'm in the inside lane) unless I tap the accelerator briefly - then is resumes CC and will pass vehicle on the outside lane to me. Has anyone had this experience??
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