Cruise control speed changes itself?

[Airstreampuller]

While on adaptive cruise I have found that with the speed set at the posted limit (70) that the truck will randomly speed up. I look down and see that the cruise setting has jumped to 75 when I never touched it. It happened three times on a two day trip. I was towing at the time which I only do at 70 on flat ground with little traffic. Dealer says it is because I have speed tolorance set at +5 mph but it only happens once in a while so I'm not buying it.

Has anyone else experienced this? Any advice?

TIA

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[Snakebitten]

You likely have a feature turned on (in Sync) that ties your cruise control speed to speed limit sign recognition?

 

[JIMFOUNTAIN]

You likely have a feature turned on (in Sync) that ties your cruise control speed to speed limit sign recognition?

This! Turn off speed sign recognition.

https://www.fordservicecontent.com/...S&div=f&vFilteringEnabled=False&buildtype=web

 

[Airstreampuller]

I also read in that area of the manual that it uses a camera in conjunction with GPS data to recognize speed limits. Considering how bad the Ford GPS is I have no doubt this could be the case. This could also be the reason it only happens occasionally. Corrupted GPS data. I specifically started checking during the drive to see if I had just pasted a speed limit sign and saw none in the mirror. It seems to have a mind of it's own sometimes.

 

[STM]

If turned on, the truck recognizes speed limit signs and adjusts speeds automatically. When there are speed limit signs on access roads, some times it reads that sign and changes the speed.
It also reads the wrong speed sign if there is a different point speed limit for a toll lane or an HOV lane that has a speed limit different from the regular lanes.
To me, these are minor annoyances considering that it reads and keeps to speed limits all the rest of the time to where I don't need to monitor speed changes, especially on surface streets..

 

[JIMFOUNTAIN]

If turned on, the truck recognizes speed limit signs and adjusts speeds automatically. When there are speed limit signs on access roads, some times it reads that sign and changes the speed.
It also reads the wrong speed sign if there is a different point speed limit for a toll lane or an HOV lane that has a speed limit different from the regular lanes.
To me, these are minor annoyances considering that it reads and keeps to speed limits all the rest of the time to where I don't need to monitor speed changes, especially on surface streets..

I see you are Austin based. My experience is different. Running on I 35 or TX 183 with recognition on has resulted in several situations when the truck mis reads the 45 MPH access road signs and slams on the brakes from 70 (or above). Following traffic nearly took me out before I could get back on the gas.

Now I 30 through Tennessee worked great... but the speed limit doesn't change much and there are often no access roads parallel. I have decided it just isn't worth the risk.

 

[STM]

Yes.. I do live in Austin and use the freeways and toll roads every day with BC on. It regularly misreads the 60 mph access road signs while I am on the highway or the 70 mph toll lane sign on mopac when I am in the non toll lane which is 65 mph.
I just reset the speed and keep going..

 

[HammaMan]

Ya know they should have at least programmed the system with the law baked in. Speed limits drop in increments of 10mph, not 25. Just a line or two of code could prevent most false changes.

 

[Calson]

With my 2022 F-150 I very seldom have cruise control turned on. When there is a car slowing down in the exit lane for the freeway this "feature" applies the brakes and the truck slows by 20 mph or more which is hazardous with anyone following behind and not expecting this sudden drop in speed.

Few things I find more annoying than incompetent drivers hitting their brakes on the freeway when all they need to do is take their foot of the accelerator pedal sooner and drop their speed gradually.
Truly makes the concept of safe and autonomous vehicles an oxymoron.

 

[powerboatr]

i had to to turn off the speed sign READING as around here the farm to market roads have signs that also bear a strange resemblance to the real signs

i find GOOGLE or my connected NAV to dead ON, with current speed limit sign
i have been watching it more closely this past 4 weeks, becasue i got a tracker app from my insurance to see how good i drive and so far the connected nav has changed speed and been correct.

on long trips, i sometimes turn it back on, especially in MS on I-10...speed limits change often , even though i think 90 is the recommended minimum for most of it through to AL,

 

[nitrobass24]

Predictive speed assist will also change your cruising speed even if sign recognition is disabled.

 

[SilverPigeon]

This may help people if they want speed sign recognition but DON'T want ACC to change speed due to signs:

Thanks to @Drevnr, I enabled SSR for Aussie speed signs, expecting it to change speed at signs like my 2023 Ranger did; but no, it recognises the signs but takes no action to adjust speed. All other ACC functions work, including Stop & Go. I really like it this way, as it's only telling me of speed signs but taking no action.

The way it may help any of you is: I can give you my current As-Built to see what is different about my behaviour that you may be able to implement; I have no idea what is causing the behaviour however ?‍?

 

[Calson]

With all the uncritical articles about AI there is a misguided belief in technology that will work flawlessly 100% of the time in 100% of the situations encountered. This false belief can kill as Tesla drivers who used their auto drive to let the car's computer make critical decisions.

It has been implicated with the two recent Ford Mastang fatal incidents where the car in auto driving mode stopped suddenly on the freeway and the drivers had no way to override the computer. It is reminiscent of the programming of the Boeing 737 Max flight controls that sent two aircraft into the ground.

If someone is too tired to drive the vehicle without computer assistance than it would be wiser to pull off the road and take a rest break. Being locked into an arrival time results in drivers exceeding the speed limit and driving when they are so fatigued as to have the slowed reflexes of a DUI driver and they kill themselves and their innocent victims.

Going back to the 1980's the computer and software companies pushed for legislation that made them exempt from any failures of their code and any consequences that resulted. So they have no skin in the game when their code kills.

 

[HammaMan]

With all the uncritical articles about AI there is a misguided belief in technology that will work flawlessly 100% of the time in 100% of the situations encountered. This false belief can kill as Tesla drivers who used their auto drive to let the car's computer make critical decisions.

It has been implicated with the two recent Ford Mastang fatal incidents where the car in auto driving mode stopped suddenly on the freeway and the drivers had no way to override the computer. It is reminiscent of the programming of the Boeing 737 Max flight controls that sent two aircraft into the ground.

If someone is too tired to drive the vehicle without computer assistance than it would be wiser to pull off the road and take a rest break. Being locked into an arrival time results in drivers exceeding the speed limit and driving when they are so fatigued as to have the slowed reflexes of a DUI driver and they kill themselves and their innocent victims.

Going back to the 1980's the computer and software companies pushed for legislation that made them exempt from any failures of their code and any consequences that resulted. So they have no skin in the game when their code kills.

Ford isn't using "ai", they're using discrete code (hundreds of thousands of lines of hand-written code) calling it ai when it's just a computer program. Both comma ai openpilot (powering the comma 3x for instance) and tesla's v12+ ADAS under the "FSD" brandname are using end to end which is "ai". Many arguments can be made but end to end models are trained to drive and then make decisions autonomously vs running if/then statements. Ford's bluecruise is not ai, but a series of discrete coded variables. The difference between the discrete code v. end to end models are opposite ends of the spectrum in how they operate. Tesla ditched their discrete code developed over 8 years, scrapping the entire thing to run their end to end system which has made more progress in 1 yr than achieved with 8 years of the previous approach.

The 2 recent bluecruise incidents both rear ended stopped vehicles. Unfortunately the radar discards stopped vehicles as clutter data and for whatever reason the mobileye camera didn't see the vehicles. However the driver didn't either (big red flag). One instance happened at night with a blacked out vehicle whereas the latest incident happened in daylight which raises some serious questions (humans run into blacked out objects on the interstate daily at night). The latest incident is clearly driver fault, the first incident the vehicle was stopped in a travel lane with no lighting.


Teslas using their ADAS are 10x safer than human drivers per incident data (older discrete code). The new version is even safer. As for the suggestion that humans can't override the computer, that's just flat out false. Both systems the driver can both brake and manually move the wheel putting the vehicle on a course change.

 

[ReverendQ]

I also read in that area of the manual that it uses a camera in conjunction with GPS data to recognize speed limits. Considering how bad the Ford GPS is I have no doubt this could be the case. This could also be the reason it only happens occasionally. Corrupted GPS data. I specifically started checking during the drive to see if I had just pasted a speed limit sign and saw none in the mirror. It seems to have a mind of it's own sometimes.

Corrupted maybe but most likely not updated navigation data. i.e. The reverse will happen also. That is, mine gets knocked down to the speed limit along a stretch of the I5 in Irvine that was under construction at 55MPH. My findings it will use the lowest of speed sign or data base.

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