Adaptive cruise control is dangerous

[Sobmartin]

Just reactivated ACC after stopping at a stop sign and it accelerated to 65 in a 50 mph area. Had to quickly brake to avaoid an emergency stop. I have commented on this before but this was scary. Ford has got to do something about this before someone gets killed.

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[MacherAWD]

Just reactivated ACC after stopping at a stop sign and it accelerated to 65 in a 50 mph area. Had to quickly brake to avaoid an emergency stop. I have commented on this before but this was scary. Ford has got to do something about this before someone gets killed.

I find ACC to be very safe, I use it all the time. I have speed sign assist turned off as that, as you say, is dangerous.

 

[Sobmartin]

I find ACC to be very safe, I use it all the time. I have speed sign assist turned off as that, as you say, is dangerous.

When there is no speed sign and it does it anyway is what i am concerned about.

 

[E90alex]

Which button did you press to “reactivate ACC”?

 

[MacherAWD]

When there is no speed sign and it does it anyway is what i am concerned about.

But you re-activated? So that assumes "resume speed" like mashing the gas to resume speed?

 

[stoopid]

In IT we refer to these issues as 'end user error'. Have you tried turning it off and back on again?

 

[MacherAWD]

In IT we refer to these issues as 'end user error'. Have you tried turning it off and back on again?

I do love how rebooting does fix issues on the Mach-e! Even while driving, "next track + volume down" at 75mph, screens blank, car fixes!

 

[Sobmartin]

Which button did you press to “reactivate ACC”?

center curved arrow

 

[stellman]

What was your previously set speed?

 

[Sobmartin]

What was your previously set speed?

50mph

 

[MacherAWD]

In IT we refer to these issues as 'end user error'.

In my IT world we call those a PICNIC (Problem In Chair, Not In Computer)

 

[Sobmartin]

In my IT world we call those a PICNIC (Problem In Chair, Not In Computer)

Unplug, it my IT world you aren’t listening to the symptom. (30 years in IT)

 

[MacherAWD]

Unplug, it my IT world you aren’t listening to the symptom. (30 years in IT)

Sorry, not directed at you. If cruise was set to 50, and it resumed to 65 then yes thats a concern. I had issues with the speed sign adjustment and turned it off, so if you have that off and it still happened then there is an issue.

 

[Scooby24]

Sounds like the predictive speed assist thought you were in a 65 mph zone. But you said it accelerated and you had to brake to avoid an emergency stop.

So you're saying there was a stopped car in front that it tried to accelerate into?

I disabled predictive speed assist because I didn't like it...sounds like you could benefit from doing so yourself.

As for avoiding an emergency stop...well without being there we can know what happened but if you turned back on ACC and there was a stopped car ahead...ACC doesn't plan for stopped vehicles...it tracks moving vehicles to keep you at pace with them. If they slow to a stop you slow with them because it's tracking the moving vehicle. I don't think the radar can negotiate stationary objects when you're up at speed or it would be giving all kinds of false alerts and phantom braking events all the time...so that's on you to be paying attention to what's going on.

 

[devmach-e]

You would’ve had the same result in another car with regular cruise control or ACC. Was there a car in front of you? It sounds like you had a speed set previously that it was trying to resume. The car is working as intended/designed. .

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