Cruise control taking control

[RickMachE]

Not totally explainable. In no way explains the car resetting the speed from 75-85 MPH when using BlueCruise. That makes no sense at all.

So let's talk facts.

BlueCruise cuts out at 80mph. It's actually when the car hits 81mph. Handsfree ends.

Predictive speed is NOT just for slowing down, if you read the link I posted. In fact, it will ACCELERATE at times.

I suggest you turn it off, then travel the same area and prove to yourself that we are correct.

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[ralteredstates]

So let's talk facts.

BlueCruise cuts out at 80mph. It's actually when the car hits 81mph. Handsfree ends.

Predictive speed is NOT just for slowing down, if you read the link I posted. In fact, it will ACCELERATE at times.

I suggest you turn it off, then travel the same area and prove to yourself that we are correct.

Please Rick. I know how to set the BlueCruise. I also know what happened repeatedly over 30 minutes. My wife was sitting next to me and also knows what happened. I grabbed the steering wheel when the speed started to go up and it didn't reach even 80 MPH before I shut it down. You weren't there. Tired of your acting like you know exactly what happened. Just stop responding if you want to act like a know-it-all. You may have more experience than I do with the car but I know exactly what happened. I happened to have been there. Were you?

 

[RickMachE]

Bye.

 

[ChrisO]

And how would that change the speed setting from 75 to 85 MPH? My interpretation of the predictive speed assist is to slow down the car when approaching curves and exits. NOT to instantly reset the speed. There are no 85 MPH signs anywhere in this state. Are you saying the car misread signs 3+ times in 30 minutes? If that's the case, the system is horrendous and should be deactivated from all cars. And yes, I was CLEARLY using BlueCruise unless Adaptive cruise control allows me to drive hands free for miles and all the blue indicators on the dash are completely wrong.

Note that there doesn't have to be any 85 MPH signs in your state. The "prediction" is also based on "map data" that might have mistakes in it.

But also, remember that I said I think this is a problem with your car and is different from the other reported "change speed" problems reported on here.

I base that on the fact that you were in BlueCruise and it shouldn't exceed 80 MPH and the other problems like it saying that the driver had disengaged it, when you didn't. Not to mention that even the "bad map data" is highly unlikely even if it is "possible".

Also, the "rules" for the predictive speed assist shouldn't have allowed this either. Whereas it can "speed up", with zero tolerance it should have never exceeded the original speed set.

Say you set cruise control to 70 MPH (zero tolerance). And a speed sign says 50 MPH (or map data) it will drop to 50 MPH. Now you go on and it sees a speed limit sign for 65 MPH it will go to that speed, but if it was to see a speed limit sign of 80 MPH is should never exceed your original 70 MPH.
If the tolerance is set to something other than zero, then the rules change a bit. For instance, while going up and down hills. For instance, a tolerance of 10 would let it go up to 10 MPH faster than what you have set while going downhill.

Personally, I think it is dangerous. If I'm going along at 70 MPH and the speed limit drops to 50 MPH and my car does that when none of the other cars around me do it, then there is the possibility of a car running into my back.

On the windy roads, adaptive cruise control is dangerous all by itself. It depends on monitoring the distance to the car in front of it, and when you are on curved roads your frontend can be pointing out into space before swinging back and pointing at the car in front of you.

 

[ralteredstates]

Note that there doesn't have to be any 85 MPH signs in your state. The "prediction" is also based on "map data" that might have mistakes in it.

But also, remember that I said I think this is a problem with your car and is different from the other reported "change speed" problems reported on here.

I base that on the fact that you were in BlueCruise and it shouldn't exceed 80 MPH and the other problems like it saying that the driver had disengaged it, when you didn't. Not to mention that even the "bad map data" is highly unlikely even if it is "possible".

Also, the "rules" for the predictive speed assist shouldn't have allowed this either. Whereas it can "speed up", with zero tolerance it should have never exceeded the original speed set.

Say you set cruise control to 70 MPH (zero tolerance). And a speed sign says 50 MPH (or map data) it will drop to 50 MPH. Now you go on and it sees a speed limit sign for 65 MPH it will go to that speed, but if it was to see a speed limit sign of 80 MPH is should never exceed your original 70 MPH.
If the tolerance is set to something other than zero, then the rules change a bit. For instance, while going up and down hills. For instance, a tolerance of 10 would let it go up to 10 MPH faster than what you have set while going downhill.

Personally, I think it is dangerous. If I'm going along at 70 MPH and the speed limit drops to 50 MPH and my car does that when none of the other cars around me do it, then there is the possibility of a car running into my back.

On the windy roads, adaptive cruise control is dangerous all by itself. It depends on monitoring the distance to the car in front of it, and when you are on curved roads your frontend can be pointing out into space before swinging back and pointing at the car in front of you.

All good points. Will be shutting off the predictive speed assist and be hyper vigilant in the future when using BlueCruise, which I rarely use around here. Too much traffic. This was one of the unusual times the traffic wasn't too bad.

 

[ChrisO]

BTW at one point I misunderstood what the tolerance was for, and set it to 10 MPH.

That resulted in it "taking off" on my wife at one point. Extremely frightening. But in reality, not as dangerous as it might have seemed. If there was a car in front of it, the adaptive cruise control would have sensed it and not "run into it".

 

[ralteredstates]

BTW at one point I misunderstood what the tolerance was for, and set it to 10 MPH.

That resulted in it "taking off" on my wife at one point. Extremely frightening. But in reality, not as dangerous as it might have seemed. If there was a car in front of it, the adaptive cruise control would have sensed it and not "run into it".

I've always set mine to 0

 

[ChrisO]

I've always set mine to 0

Yeah, I only made that mistake once. (note I wasn't implying that you made that mistake, just relating I understand how frightening something like that can be.)

 

[Tampamike]

A couple points of clarification:

1) You can be in Blue Cruise above 81 mph just not hands free. In the OP’s situation, he can be in hands free Blue Cruise at 75 and then when the car accelerates toward 85, it will revert to hands on Blue Cruise passing 81, sound an alert and tell you to put your hands on the wheel and stabilize at 85.

2) Predictive Speed Assist includes both curve speed adjustment and speed limit speed adjustment (see screen shots) and can be set at any number between -20 and +20.

My guess is that there is either a sign that isn’t a speed limit sign that says 85 on it in big numbers (less likely) or the Blue Cruise database has an erroneous speed of 85 encoded into it (more likely Since it happened 3 times).

I use Blue Cruise on the highway all the time. I also use Predictive Speed Assist all the time in the highway. I’ve had it speed up and slow down because of reading the wrong signs and database changes. I’ve never come close to getting in an accident. It’s quickly and easily overridden with a tap on the brake or a press of the accelerator. It easily resumes by letting off the accerator and tapping the cancel/resume button.

 

[ChrisO]

@ralteredstates
It just occurred to me that you might want to post in the FDRS thread to have someone there check if there is anything reported wrong on your Mach-E for BlueCruise.

 

[Mach-Lee]

All good points. Will be shutting off the predictive speed assist and be hyper vigilant in the future when using BlueCruise, which I rarely use around here. Too much traffic. This was one of the unusual times the traffic wasn't too bad.

I think Rick was right. You have to understand the detected speed limit can be wrong because of a) bad map data, and b) misreads of signs. So even if there isn't an actual 75 MPH speed limit sign, it can change to 75 MPH. You must turn off predictive speed assist to ensure the set speed will not change. The curve speed control (which sucks) and the speed sign recondition are now combined into one feature, and there's no way to turn off one but not the other.

To check map data, go here: https://mapcreator.here.com/?l=37.8094,-95.9243,5,normal, zoom in on the road segment where the speed changed at zoom level 16 or higher, and hover on the road to see the recorded speed limit. If it's wrong, you can email them and request a change, but it can take a year. They also go by what Google Street View shows, so if the road had a temporary speed limit when the Google car went by or has changed since, you'll be SOL for getting the change approved even if the current speed limit makes no sense (which is why HERE maps sucks).

And sometimes it just reads the signs wrong or thinks a different sign is a speed limit sign.

 

[ralteredstates]

I think Rick was right. You have to understand the detected speed limit can be wrong because of a) bad map data, and b) misreads of signs. So even if there isn't an actual 75 MPH speed limit sign, it can change to 75 MPH. You must turn off predictive speed assist to ensure the set speed will not change. The curve speed control (which sucks) and the speed sign recondition are now combined into one feature, and there's no way to turn off one but not the other.

To check map data, go here: https://mapcreator.here.com/?l=37.8094,-95.9243,5,normal, zoom in on the road segment where the speed changed at zoom level 16 or higher, and hover on the road to see the recorded speed limit. If it's wrong, you can email them and request a change, but it can take a year. They also go by what Google Street View shows, so if the road had a temporary speed limit when the Google car went by or has changed since, you'll be SOL for getting the change approved even if the current speed limit makes no sense (which is why HERE maps sucks).

And sometimes it just reads the signs wrong or thinks a different sign is a speed limit sign.

I understand what you are saying but I had it set to 75 and the car (blueCruise on) automatically reset it to 85 MPH. That's the concern. That shouldn't happen under any circumstance as far as I can tell. I have a couple of other cars that know the speed limit wherever I am and shows it on the dash. These cars are "dumb" compared to the Mach E but obviously know better through their nav units what the speed limit is. One of the cars is a Honda Accord that doesn't even have a built in nav but it still shows the speed limit on the dash. I have never driven (or know of a place on the east coast) that has a speed limit of 85MPH (no less anyplace higher than 65 MPH.) Personally, I think this is dangerous that the car, for any reason, would reset my speed to 85MPH. I no longer trust it.

 

[Ravensfan1996]

Please Rick. I know how to set the BlueCruise. I also know what happened repeatedly over 30 minutes. My wife was sitting next to me and also knows what happened. I grabbed the steering wheel when the speed started to go up and it didn't reach even 80 MPH before I shut it down. You weren't there. Tired of your acting like you know exactly what happened. Just stop responding if you want to act like a know-it-all. You may have more experience than I do with the car but I know exactly what happened. I happened to have been there. Were you?

Rick knows a lot about the Mach e and has helped out many on this forum. Probably one of the most knowledgeable ones here. We are all here to help you but you are making it very difficult with your remarks. As he noted you are wrong about the predictive speed assist. Not only does it slow down in curves, but its also what they changed the read speed sign option to. (If you click the little (i) next to any option it tells you what it does. With that on, what is happening to you can happen. Either the cloud database, or something about sign the car reads wrong When it gets that area and sets the speed to 85 bases on the wrong info. When i saw posts about this 4 years ago its the first thing i turned off and remained off. I wish the slow curve setting and the sign recognition were separate options. Turn off predictive speed assist and that should solve the problem.

 

[ralteredstates]

Rick knows a lot about the Mach e and has helped out many on this forum. Probably one of the most knowledgeable ones here. We are all here to help you but you are making it very difficult with your remarks. As he noted you are wrong about the predictive speed assist. Not only does it slow down in curves, but its also what they changed the read speed sign option to. (If you click the little (i) next to any option it tells you what it does. With that on, what is happening to you can happen. Either the cloud database, or something about sign the car reads wrong When it gets that area and sets the speed to 85 bases on the wrong info. When i saw posts about this 4 years ago its the first thing i turned off and remained off. I wish the slow curve setting and the sign recognition were separate options. Turn off predictive speed assist and that should solve the problem.

As your pic indicates (contrary to what you wrote) the information attachment does not say anything about reading speed signs like it did in my previous Mach E. The information attachment on my screen doesn't have that diagram picture with it either. That may have come with an update that I haven't received. There are a few updates I know I haven't received. Still have the problem with the rear hatch only opening a few inches that was supposedly fixed with an update. I've now turned predictive speed assist off. As far as Rick is concerned, yes I agree he is VERY knowledgeable but he also can be very snarky and that is quite a turnoff. Maybe he can take a lesson from Mark about how to be pleasant in answering questions.

 

[devmach-e]

Again, its turned off. And you are saying it can read the sign wrong 4X in a half an hour? Please, it is definitely a glitch. You are insulting my intelligence. I've been driving the Mach E for 4 years and know all the settings. And yes, I know that CarPlay is controlling "the nav". Wow. And the cruise control was setting itself to 85 mph, REPEATEDLY . You are really annoying. Wow. Thanks

I know you said you turned off those settings a while ago, but is it possible that they got turned back on via something OTA update and you didn't notice? I've gotten a number of a OTA updates where stuff I had previously turned off became enabled again and had to go in and disable again. Verify that they are still truly off.

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