Uncontrolled/Unintended Acceleration on 2023 MME while using single pedal drive **SAFETY ISSUE**

[Justconn1]

Or assume one doesn't I suspect. Right?

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[Kamuelaflyer]

I cannot visualize how anyone could inadvertently hit any of the buttons on the steering wheel if both hands are on the wheel in a correct position

Hand placement recommendations have changed over the years. The old “10 & 2” were dropped due to the advent of airbags. 10 and 2 lends themselves to broken arms during an airbag deployment. The original change from there was “9 and 3”. That’s right next to the ADAS controls. Currently many are suggesting “8 and 4”. That’s how I try to drive but it takes repeated focus or my hands slip back to 10 and 2.

For those trained in 9 and 3, which is a huge percentage of drivers, it’s going to be an issue.

All of which means that Ford’s engineering teams will be doing more human factors design work with generation 2 I think. In the meantime, a reprogramming of the low speed limit for engagement might help.

 

[rreddy3]

Hand placement recommendations have changed over the years. The old “10 & 2” were dropped due to the advent of airbags. 10 and 2 lends themselves to broken arms during an airbag deployment. The original change from there was “9 and 3”. That’s right next to the ADAS controls. Currently many are suggesting “8 and 4”. That’s how I try to drive but it takes repeated focus or my hands slip back to 10 and 2.

For those trained in 9 and 3, which is a huge percentage of drivers, it’s going to be an issue.

All of which means that Ford’s engineering teams will be doing more human factors design work with generation 2 I think. In the meantime, a reprogramming of the low speed limit for engagement might help.

Yes, I suspect you’re correct, they will be doing more human factor design work. Personally I’m not a fan of 8 - 4. I prefer 9 - 3 or shading to 9:30 - 2:30, I also wrap my thumb around the wheel, but perhaps most people do. I can see if people don’t wrap the thumb around the wheel, how a thumb could go rouge and hit a button.

 

[azerik]

I find it impossible to do doughnuts with my hands at 8 and 4, and driving my MME. My Gen2 Lightning I could.

 

[Mach1E]

You cant activate cruse control at the speed I was moving. I tried, at low speed it wont turn on. So people saying “user error” you hit a button are full of shit. At least in my experience. But really just sharing my experience. All the “experts” in human behavior can chime in now.

You can’t normally start cruise control at low speed (below 15 or 20 mph, can’t remember which) but you can “resume” cruise control from even 0 mph.

There also something in the logic that seems to allow you to start cruise when you hit that button if it detects a car (or something it thinks is a car) in front of you.

That seems to be a part of all of these stories too. It’s always in a parking lot and always with something in front of you.

Hitting the button at low speeds on an empty road gives you an error message.

 

[Art]

Sorry for the late reply - didn't see this thread till now....

Agree - very common to confuse the brake vs accelerator pedals in an abrupt decision.

I have seen many people locally drive their cars into businesses and homes by "accident" during a parking maneuver.

As for 1PD, like @RickMachE, I don't use it - no matter what the dealer may have told the OP.

Where I drive, 1PD does not work well enough to prevent a collision (urban Los Angeles bumper to bumper traffic) - constantly need to jump on the brakes so it's 2PD....

Also, 1PD interferes with my muscle memory as I also drive white fleet government work vehicles (2PD and 3PD) and if I get into an accident, the state police gets involved automatically, get a DUI field test, blood draw at the doctor's office, and a ton of "paperwork" to fill out.

I would think that driving 1pd would be helpful in panic stops.
The instant you get off the accelerator, the car begins to stop, Then you hit the breaks to come to a panic stop. If you are using 2pd, you don't begin to stop until you hit the friction brakes.
My two cents.

 

[Mach1E]

I would think that driving 1pd would be helpful in panic stops.
The instant you get off the accelerator, the car begins to stop, Then you hit the breaks to come to a panic stop. If you are using 2pd, you don't begin to stop until you hit the friction brakes.
My two cents.

I’m sure someone could measure it, but I would guess the difference is negligible.

It would come down more to muscle memory vs reaction time.

In both instances your foot goes from the accelerator and ends up on the brake pedal.

The only difference would be how much 1 pedal slows in that fraction of a second when you’re moving from one to the other compared to whatever 2PD drive mode you’re in.

I doubt it would be even a 1 mph difference before you slam the brakes. Likely much less. And the advantage may even go to a faster “muscle memory” for 2PD when you aren’t as used to hitting the brake pedal when using 1PD.

I looked it up, takes 3/4 of a second to move from gas to brakes on average. Where are my math people who could measure the amount of deceleration for 1PD vs engage mode in that time?
https://www.automotive-fleet.com/dr...ies have shown that it,gas to the brake pedal.

 

[4sallypat]

I’m sure someone could measure it, but I would guess the difference is negligible.

It would come down more to muscle memory vs reaction time.

In both instances your foot goes from the accelerator and ends up on the brake pedal.

The only difference would be how much 1 pedal slows in that fraction of a second when you’re moving from one to the other compared to whatever 2PD drive mode you’re in.

I doubt it would be even a 1 mph difference before you slam the brakes. Likely much less. And the advantage may even go to a faster “muscle memory” for 2PD when you aren’t as used to hitting the brake pedal when using 1PD.

I looked it up, takes 3/4 of a second to move from gas to brakes on average. Where are my math people who could measure the amount of deceleration for 1PD vs engage mode in that time?
https://www.automotive-fleet.com/driver-care/239402/driver-care-know-your-stopping-distance#:~:text=Studies have shown that it,gas to the brake pedal.

For me it's muscle memory so I am quicker braking using 2PD.

Also in heavy traffic where I drive daily, it's impossible to drive 1PD without getting nauseated like my wife & get when we are in a Tesla.

We love 2PD but may switch over to 1PD if we move out of Los Angeles traffic...

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