Have you been rear-ended using 1PD?

[sukhoi_584th]

Oh they come on. I was behind a MME a couple months ago cruising on the freeway with brake lights pulsing like a techno concert. I concluded that must have been the result of 1PD. It was very annoying.

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[Old Guy]

And this led to getting rear-ended?

And this led to getting rear-ended?

wrong thread obviously. With the way deliveries are going it doesn’t look like I’ll ever find our about getting rear ended.

 

[ponydsp]

Oh they come on. I was behind a MME a couple months ago cruising on the freeway with brake lights pulsing like a techno concert. I concluded that must have been the result of 1PD. It was very annoying.

Ah, that’s why I always feel like the Tesla driver in front of me is having a seizure…

 

[Griddlez]

I have been rear ended when I was using 1PD... but I was at a complete standstill and the guy was just an idiot. But after that, I've tried to take notice of how sensitive the brake lights are to deceleration when using 1PD. It can be hard to tell but I've tested on some dark roads and I feel confident that they do come on with even mild slowing using 1PD.

Note: Getting rear ended at a standstill using 1PD made me realize I needed to develop the habit of resting my foot on the brake when stopped even though the car does Autohold. At the time I was rear ended, my foot was on the brake and I mashed the pedal hard and still barely missed hitting the guy in front of me. If my foot hadn't been on the brake, I'm not sure that would have been the case. And if my foot had been on/near the accelerator, that could have been disastrous.

Extremely good info - I was curious if the car had tech to stop itself in this situation. Good to know it's best to have your foot on the brake!

 

[RickMachE]

This is exactly the scenario my wife asked me about.
What happens if the foot is near accelerator and someone rear ends you.
I am wondering if car has any crash sensors that would disable acceleration in an accident?

The Mach-E, as part of the Ford Co-Pilot360 Technology, has Post-Collision Braking. This brings the car to a complete halt after a collision.

Generic info:

How Post-Collision Braking Works
Unlike pre-collision warning systems, which use radar and cameras to monitor the road ahead to detect frontal collisions before they happen, post-collision braking goes into effect in the milliseconds following an initial impact.

Airbag deployment or fuel cutoff are the signals that the post-collision braking system should engage. When either of these things occurs, the system knows the vehicle has been in a collision and immediately initiates braking to provide a moderate level of deceleration to prevent the car from rolling forward and hitting another object.

However, the driver retains control of the accelerator and brake, allowing them to override the system at any time. In addition to slowing the vehicle down, the post-collision braking system will activate the flashing hazard lights to alert approaching drivers of an incident.

Post-collision braking systems operate under certain rules and prerequisites:

• Since abrupt braking at high speeds can result in even more severe secondary collisions, the system will not activate if the vehicle speed exceeds a pre-determined limit. Each automaker sets the upper speed limit for their individual system.
• The system will deactivate if the driver mashes the accelerator pedal. The system will view this action as an attempt to avoid secondary collisions with other objects.
• The system will deactivate once the vehicle comes to a complete stop.

Post-collision braking is usually not applicable in low-speed accidents on side streets or parking lots. In those “fender bender” situations, the vehicle generally comes to a halt at impact.

 

[generaltso]

With the way deliveries are going it doesn’t look like I’ll ever find our about getting rear ended.

That‘s unfortunate. As long as we’re off topic, I waited 16 months for mine. How long has it been for you?

 

[ponydsp]

This is a great find. Thanks. I somehow missed that after my first read of the manual… continuing my second read…

The Mach-E, as part of the Ford Co-Pilot360 Technology, has Post-Collision Braking. This brings the car to a complete halt after a collision.

 

[RickMachE]

This is a great find. Thanks. I somehow missed that after my first read of the manual… continuing my second read…

If you find it in your second read, let me know. Because it's not in there... HA!

It's in the Order Guide. It's not in the manual. That's what I cut and pasted from.

Edit: Also on page 269 of the manual.

 

[ponydsp]

Page 269 under post-impact braking. It’s awesome. I wonder if the 1-P drivers still need to hover over the brake when they are stopping. But that’s also trusting the system a little too much…

If you find it in your second read, let me know. Because it's not in there... HA!

It's in the Order Guide. It's not in the manual. That's what I cut and pasted from.

 

[RickMachE]

Page 269 under post-impact braking. It’s awesome. I wonder if the 1-P drivers still need to hover over the brake when they are stopping. But that’s also trusting the system a little too much…

Ah. They took out the hyphen, that's why I didn't find it with search in the PDF. I did remember reading it, then found it in the Order Guide.

POST IMPACT BRAKING

How Does Post Impact Braking Work
In the event of a moderate to severe crash, the braking system reduces the vehicle’s speed in order to prevent or reduce the impact of a potential secondary crash.

Post Impact Braking Limitations
Post impact braking does not activate if any of the following occur:
• The anti-lock braking system is damaged during the collision.
• Electronic stability control is disabled.

Overriding Post Impact Braking
You can override post impact braking by pressing the brake or accelerator pedal.

Post Impact Braking Indicators

It flashes when a post impact braking event is occurring.

 

[Logal727]

If you’re slowing abruptly with 1PD all the time you’re not using it right. I’ve got to the point where I feather the pedal enough to pretty much the same stop as non 1PD.

 

[rzanzerkia]

Thanks for the user guide post...

So "post-collision" looked promising but this statement makes me think if you get hit from behind and mash on the accelerator car will still accelerate ?

• The system will deactivate if the driver mashes the accelerator pedal. The system will view this action as an attempt to avoid secondary collisions with other objects.

 

[jeffdawgfan]

I have followed my wife driving the Mach E at night and the brake lights come on just about any time she lets up while 1pd. As a matter of fact it was a little annoying like following behind somebody that is driving with two feet and is constantly braking while driving. There is no excuse for someone to rear end you while 1pd.

 

[DevSecOps]

I have followed my wife driving the Mach E at night and the brake lights come on just about any time she lets up while 1pd. As a matter of fact it was a little annoying like following behind somebody that is driving with two feet and is constantly braking while driving. There is no excuse for someone to rear end you while 1pd.

No offense, but your wife probably hasn't mastered 1PD if you see that happening. A lot of people drive ICE vehicles by accelerating, letting off, accelerating, letting off. With 1PD that's gonna be a rough ride. You have to slow by gradually letting off the pedal which won't trigger the brake lights - or - for the ICE experience just turn off 1PD.

Obviously that driving style in ICE doesn't trigger the brake lights, but in an EV with 1PD it will.

 

[SAM]

Not to be rude, but your wife hasn't mastered 1PD if you see that happening. A lot of people drive ICE vehicles by accelerating, letting off, accelerating letting off. With 1PD that's gonna be a rough ride. You have to slow by gradually letting off the pedal which won't trigger the brake lights or for the ICE experience just turn off 1PD.

Obviously that driving style in ICE doesn't trigger the brake lights, but in an EV with 1PD it will.

This is correct. I use 1PD 100% of the time. Removing your foot from the go pedal will cause the car to brake and tail lights to light. Easing off gently on the go pedal doesn't cause the brakes to light unless above certain thresholds (length and amount of easing). Maintaining speed requires feathering the go pedal and does not light the brake lights.

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