BlueCruise safety problem

[Richgossman]

This past Friday night I was using Blue Cruise on my way home. I was cruising comfortably at 75mph for about 10 miles when the car suddenly accelerated to 90. I turned off Blue Cruise and tried to use it again and the problem repeated itself and in short order.

I have attempted to get it to do it again since in the day and at night and it has not popped up again.

Has anyone heard of this before? Is there a known issue?

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[tuminatr]

Could be this depending on your year.

https://auto.hindustantimes.com/aut...intended-acceleration/amp-41653196348137.html

 

[Mach-Lee]

Turn off speed sign recognition. It will accelerate when it sees a different speed limit sign based off your set tolerance. You might have it set to +20 mph over the limit.

 

[azerik]

Still needs a big ol warning pop up if anyone has this enabled.

 

[corradoborg]

Were you on Route 90? Do you have speed limit detection on? Sometimes the speed limit detection misinterprets numbers on non-speed limit signs as the speed limit. It has caused both unintended acceleration and deceleration, depending on what driving mode people were using.

 

[Richgossman]

Route 91

 

[corradoborg]

Route 91

There you go. If you turn off speed limit detection, the issue will go away. I prefer to tell my car what max speed to go rather than rely on bad AI to decide for itself.

*edited for spelling error (turn off, not turn of)

 

[awp0]

I'm surprised this feature still exists. It seems pretty unreliable, dangerous, and scary to people.

 

[2021-MMEx-RT1]

I'm surprised this feature still exists. It seems pretty unreliable, dangerous, and scary to people.

but, but, Ford knows best!!

 

[mateo]

This feature is useless and dangerous, the best combination.

For example, it thinks Route 75 means to go 75 MPH, even if you are in town, on a single lane road, when the previous known limit was 30 MPH, Google maps is saying it's 30 MPH, and nobody else is going even remotely that fast.

Or if you are driving to Chicago on I90, where there may be different speeds posted depending on if you are a truck, a bus, a car, in construction zone, etc... Every time you pass a different one you speed up or slow down since it cannot comprehend the subtext.

It works "good enough" to be a nag option if it thinks you are speeding or going too slowly, but as an auto-adjustment feature, it's downright irresponsible.

 

[VaporTrails]

Yes, I live near hwy 31. ? It took exactly twice before I was ripping the settings screen apart to disable this. I like being notified. I do not like being the cause of a pileup.

 

[Vulnox]

I am glad the feature exists, and people can just turn it off. I have had a few false changes, but it's exceedingly rare. The speed limit change, BlueCruise, Lane Centering, they are all features you can enable or disable and they are driver assistant, not driver replacement.

There is no "safety" issue if it misreads a speed limit sign because you should be aware your car is starting to accelerate to 90 MPH or whatever, and it definitely shouldn't have enough time to get there before you take over. It won't run you into someone either since it will still going only as fast as the vehicle in front of you.

I am not defending when it gets it wrong, at all. But Ford never advertised it as flawless and all the auto manufacturers advertise these as driver assistance and "the driver should be prepared to resume control at any time".

 

[corradoborg]

Yes, I live near hwy 31. ? It took exactly twice before I was ripping the settings screen apart to disable this. I like being notified. I do not like being the cause of a pileup.

I've never tested it to find out what it would do, but I live next to Hwy 1. ?

I ended up getting a Premium AWD SR, but what got me to look at the MME in the first place was the notion of driving around a CR1 on CR1.

 

[corradoborg]

I am glad the feature exists, and people can just turn it off. I have had a few false changes, but it's exceedingly rare. The speed limit change, BlueCruise, Lane Centering, they are all features you can enable or disable and they are driver assistant, not driver replacement.

There is no "safety" issue if it misreads a speed limit sign because you should be aware your car is starting to accelerate to 90 MPH or whatever, and it definitely shouldn't have enough time to get there before you take over. It won't run you into someone either since it will still going only as fast as the vehicle in front of you.

I am not defending when it gets it wrong, at all. But Ford never advertised it as flawless and all the auto manufacturers advertise these as driver assistance and "the driver should be prepared to resume control at any time".

I mostly agree with the notion that drivers should be able to cancel an unwanted acceleration before it gets out of hand, but false decelerations are a different issue. We have no control over how close someone behind us chooses to follow and how attentive THEY are. It's entirely possible that a Mach-E suddenly decelerating to an unreasonably slow speed on a freeway could cause an accident faster than the Mach-E driver can respond and accelerate again. I think that as long as there are no obstacles in front of the car, it should never suddenly decelerate faster than coasting would allow.

 

[Vulnox]

I mostly agree with the notion that drivers should be able to cancel an unwanted acceleration before it gets out of hand, but false decelerations are a different issue. We have no control over how close someone behind us chooses to follow and how attentive THEY are. It's entirely possible that a Mach-E suddenly decelerating to an unreasonably slow speed on a freeway could cause an accident faster than the Mach-E driver can respond and accelerate again. I think that as long as there are no obstacles in front of the car, it should never suddenly decelerate faster than coasting would allow.

TOTALLY agree, and I thought about that a bit after I posted, because I feel like I have had the incorrect reading be low more than high, and you're totally right that even normally attentive drivers behind you could be slow to react if they expect everyone to be doing at least 70, and suddenly your car is doing 60.

For me the instances have still been very rare, to the point of novelty. But it is interesting when people report the same highways having issues. In Michigan it's not common, at least around us, for them to have the truck and passenger vehicle speed limit on the same sign, and we usually don't have service roads that are close to the highway and on the same level as the highway where some report that 45 MPH signs on the service road are read.

So not discounting those that do have persistent issues, or saying they shouldn't turn it off. I was more responding to the idea that Ford knows best, or the feature itself isn't good. I suspect for most people it works really well or we would have NHTSA investigations over it by now. It's been in the F-150 and Mach-e at a minimum for about 3 years. So I am glad it's there, but certainly don't fault someone for not liking it.

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