Adaptive Cruise Control changes to 75mph OFTEN

[Bobcatou]

I'm on a road trip to Zion National Park and put about 500 miles on my Powerboost today. I haven't used cruise control for about 2 months and have I believe 2 sync updates since then. maybe only one.

Anyway, on today's trip while in adaptive cruise, I would be cruising along and the cruise control would change to whatever I was driving to to 75mph. I'm trailering a camper, so I am generally going below that at around 65 to 70mph. Not over.

I haven't found a reason to cause it yet. It just decides to on it's own and I can't create a situation to make it do it.

Anyone else have this issue?

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[Str8Shooter]

Turn off Intelligent Adaptive Cruise Control and just use regular adaptive cruise control. The Intelligent Adaptive Cruise Control combines speed signs as part of cruise control. You may have 4 different levels of Cruise Control. 1: Cruise control. 2 Adaptive Cruise Control 3. Intelligent Adaptive Cruise Control 4. Blue Cruise

You could also keep the Intelligent speed sign on and modify the speed tolerance to be +/- mph different than the speed sign.

I personally do not like the Intelligent part because some parts of the highway system have signs where the limit changes too often and it freaks out or upsets people diving behind me.

 

[Aonarch]

Turn off Intelligent Adaptive Cruise Control and just use regular adaptive cruise control. The Intelligent Adaptive Cruise Control combines speed signs as part of cruise control. You may have 4 different levels of Cruise Control. 1: Cruise control. 2 Adaptive Cruise Control 3. Intelligent Adaptive Cruise Control 4. Blue Cruise

You could also keep the Intelligent speed sign on and modify the speed tolerance to be +/- mph different than the speed sign.

I personally do not like the Intelligent part because some parts of the highway system have signs where the limit changes too often and it freaks out or upsets people diving behind me.

Plus a lot of times my speed sign is incorrect, unless I'm on an interstate. I've had wildly incorrect speed limits, from 35 in a 70, to 55 in a 15.

 

[Buyer2021]

In addition to reading speed signs the adaptive cruise uses GPS and a mapping database for setting speed.

I've no idea how it decides what to use when there's conflict between signs and the mapping database, but I do I regularly travel one stretch of highway where the ACC speed consistently adjusts to different from the posted speed.

 

[whizkidder]

The intelligent adapive cruise fuzes what the cameras read off the signs with what is stored in the GPS database (Forscan can turn off fusion and select one or the other…). As noted, the GPS database is sometimes wildly inaccurate — especially where past road construction has temporarily altered the limits. The construction reduction in the limits (and returns to “normal”) may still be in the data, so the fusion will often reduce or increase the cruise set point absent any visible evidence of a speed limit change. I have considered turning off the data and using cameras only, but then you risk missing a change due to an adjacent vehicle blocking the cameras’ view of the road signs.

 

[FaaWrenchBndr]

Anyone else have this issue?

Some bad info posted above. You need to disable “predictive speed assist”

 

[Ford Motor Company]

I'm on a road trip to Zion National Park and put about 500 miles on my Powerboost today. I haven't used cruise control for about 2 months and have I believe 2 sync updates since then. maybe only one.

Anyway, on today's trip while in adaptive cruise, I would be cruising along and the cruise control would change to whatever I was driving to to 75mph. I'm trailering a camper, so I am generally going below that at around 65 to 70mph. Not over.

I haven't found a reason to cause it yet. It just decides to on it's own and I can't create a situation to make it do it.

Anyone else have this issue?

Hi Bryan, If you’d like further assistance regarding the cruise control, feel free to send us a private message with your VIN and local Ford dealer. Thank you!

 

[Calson]

I avoided several accidents that would have been the result of the Ford adaptive cruise control operation. I disabled this "feature" as it is the downsides are not worth any positive aspects.

Applications such as this require expert application design the accounts for 100% of possible situations and is fail safe. Few programmers today understand how to do this and so as a practical matter, and having led very large sotware developement projects for multiple Fortune 100 companies, I keep my expectations in check.

I only use cruise control when there are not other vehicles within hundreds of yards ahead and never when there is another vehicle in the next lane as this confuses the programming of the application.

 

[Bobcatou]

Thanks guys. I forgot I changed the setting to adaptive assist cruise control and added 5 mpg buffer.

I changed back to Adaptive cruise control and all works fine.

Thanks for the tips

 

[Snakebitten]

I only use cruise control when there are not other vehicles within hundreds of yards ahead and never when there is another vehicle in the next lane as this confuses the programming of the application.

I'll probably regret this, but I'm taking the bait.

When does the vehicle in the next lane confuse the programming of the application?

Or, how exactly does the confused programming manifest?

I use Adaptive Cruise every single day in either the F150 or the Mach-E. They both are incredibly unconfused. Admittedly not perfect in every possible circumstance, but absolutely stable for 98% of normal traffic flow.

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