Adaptive cruise control almost caused an accident

[powerboatr]

For stop and go traffic, set your truck to eco mode. It really smooths out the accelerations. In general, any time a decent space opens up in front of you, but farther ahead there is a slow down, just plan on braking yourself. It's not AI looking two steps ahead. You can also set the cruise speed a lot lower, so it doesn't speed up as much just to hit the brakes. KInd of like semi trailers do sometimes so they don't have to change gears a bunch and wear out their brakes. Of course none of this helps keep other people from jumping in front of you...

"Of course none of this helps keep other people from jumping in front of you..."
bingo
the "i have to be first" people really mess with the system
it sees a new distance and will slow or apply brakes, even at the close setting, vehicles can push in between you and the vehicle in front. it gets annoying, your trying to be safe and boom a turkey squeezes in because they have to be 1st.

i have stated before, the evasive features and emergency braking have saved my bacon a few times, it works scary fast and safe imo.
adaptive cruise uses time/distance logarithms so every time a new item is squeezed in, to change the equation, it has to do heavy math and make a determination. sometimes it cant adjust fast enough because of variables changing to fast ..like mr i have to be first or mr let me ride the center line acting like he is going to cut you off


HAL is pretty smart, but things fail or change so we as drivers have to pay attention, and for me, i drive with the tech, not let tech drive me as it were

heavy stop go traffic is tough for humans, the tech gives us a second set of eyes etc
but in other stop go times like road construction, its very very helpful .
my moms maverick has the system and her truck is very different in its behavior, it stops aggressively if needed and less aggressive as traffic dictates

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[STM]

I understand different people have different experiences with AAC and BC.. some people trust the technology and others don't..

I don't think anyone is right or wrong.. Just our preferences and comfort level at the end of the day..

I drive a lot of miles every day on in city freeways.. And I use BC all the time.. It works great and takes away me needing to apply brakes and gas precisely while in traffic and particularly, stop and go traffic..

I always have my foot hovering over the brake pedal and I am paying attention. But the fact that I don't have to regulate braking or accelerating is a huge help..

The only time I get spooked is when I am going 65 mph plus and the traffic ahead is stopped or almost stopped.. The truck likes to slow down way later than to my comfort.. I just take over and brake sooner and then activate BC again and it takes over..

Overall, I love having BC and ACC!

 

[redline]

I would never trust ACC in stop and go... but i have my issues with it.

I have it several times on a four lane divided highway and i am in the fast lane and there is a car in the slow lane going around a corner and truck slams on the brakes for a car in the wrong lane...

the other day a guy in the left lane pulled onto the shoulder and i pulled in the other lane to move around him and the truck slammed on the brakes with no one in front of me and i nearly got rear ended...

 

[powerboatr]

I would never trust ACC in stop and go... but i have my issues with it.

I have it several times on a four lane divided highway and i am in the fast lane and there is a car in the slow lane going around a corner and truck slams on the brakes for a car in the wrong lane...

the other day a guy in the left lane pulled onto the shoulder and i pulled in the other lane to move around him and the truck slammed on the brakes with no one in front of me and i nearly got rear ended...

i have found some easter egg things the manual touches on but does not go far enough
imo
if your on adaptive cruise and change lanes without using turn signal, the system senses your outside your lane will shake wheel or give an alert, and will sense vehicle in front of you or maybe on edge of lane. i found this when passign slower semis, if i used signal the system stayed on speed, if i didnt use signal it would slow abruptly as i moved over. scare or gives you pause

if guy is pulling off in emergency lane in front of you and you change lanes without using turn signal, which is ALL THE TIME HERE for most people
the system senses the car is stopping, even though you are moving over


on coming traffic is weird at times on roads with curves or SHRUBS. my wifes car will brake everything on the same stretch of highway for what i can see are shrubs in the median. my truck ignores those shrubs in same spot.
she has first generation adaptive cruise on the edge, it also is very sensitive to semis on the right as she passes, if they wiggle near white line, her car will drop speed, so we pay attention in her car
my truck not so much for same instance

leaving town on a down hill approach, same spot everytime ..her car sees a building crossing in the road, at least thats how i have figured it
my truck never sees this building as a lane crosser . she gets the red heads up lights and i do not


gore point lines at exits also tend to depending on sun try to make truck follow that line vice stay in lane

and BUGS and other crap on upper window seem to cause most weirdness around here, at least

 

[MJ Heat]

I have a 2022 302a with Adaptive Cruise. I have had this same problem with rapid acceleration on Cruise Control on a few different occasions over the last several months.

It happened to me early this morning. I decided to check in here to see if anyone else was having the same problem, & low & behold found this thread.

The 1st time I experienced this problem, I thought that I must have inadvertently pressed a button to unintentionally significantly increase the speed setting. I immediately mashed the brake pedal to disengage the Cruise Control & decided to pay close attention to my hand placement when using Cruise Control in the future.

Since that 1st time, it has happened 5 or 6 additional times. Each time the speed setting has instantaneously increased at least 8 or 10mph, without any input from me (at least as best I can tell). I had the speed setting once go up 19mph, with the corresponding acceleration, for no apparent reason.

Very early this morning I had the need to travel about 100 miles on a sparsely populated expressway. I set a cruise speed of 69mph & it held for more than 90 miles. As I was getting to the end of the run, all at once the Cruise Control posted speed setting shot up to 78mph, again on its own.

I strongly advise that everyone pay very close attention when using Adaptive Cruise Control. This could be a disaster in the making. Each time that I have had this problem, I have managed to stop it with a tap of the brakes or by immediately turning the cruise control off, but I am rapidly losing confidence in this feature.

 

[Snakebitten]

Cruise Control speed settings can be influenced by speed limit and settings for "mph above speed limit" settings?

I'm just recalling things I think I have read. I don't have such options enabled. I DO use ACC and Lane Centering daily, but keep it in manual mode, so to speak. My left thumb is determining all settings/values in real time.

 

[MJ Heat]

Cruise Control speed settings can be influenced by speed limit and settings for "mph above speed limit" settings?

I'm just recalling things I think I have read. I don't have such options enabled. I DO use ACC and Lane Centering daily, but keep it in manual mode, so to speak. My left thumb is determining all settings/values in real time.

I have turned off these various settings myself. But as of now, I cannot fathom how the Cruise Control speed setting can change itself, without intentional input.

If there is anyone who can enlighten me as to how I can insure that doesn't happen again, I would be very appreciative. It is incredibly disconcerting (and dangerous) to say the least, when it does that.

 

[powerboatr]

I have turned off these various settings myself. But as of now, I cannot fathom how the Cruise Control speed setting can change itself, without intentional input.

If there is anyone who can enlighten me as to how I can insure that doesn't happen again, I would be very appreciative. It is incredibly disconcerting (and dangerous) to say the least, when it does that.

any time an update happens the setting can be upset or changed. maybe not on purpose ...but they do

my 1st guess was the auto speed sign recognition was turned on... it was on by default when i got my truck and it scared the crap out of me until i figured out what was what
it was set ten over the limit so when it saw a 70 right after a 55 it took off like a bat out of hades

ditto what bruce stated

 

[MJ Heat]

any time an update happens the setting can be upset or changed. maybe not on purpose ...but they do

my 1st guess was the auto speed sign recognition was turned on... it was on by default when i got my truck and it scared the crap out of me until i figured out what was what
it was set ten over the limit so when it saw a 70 right after a 55 it took off like a bat out of hades

ditto what bruce stated

Thank you for reminding me! I will make a point of rechecking all of those settings. On the other hand, if it is not, the default settings really ought to be at the lower end of the range spectrum for safety's sake.

 

[powerboatr]

Thank you for reminding me! I will make a point of rechecking all of those settings. On the other hand, if it is not, the default settings really ought to be at the lower end of the range spectrum for safety's sake.

you would think so...
i had no idea it was set when i first took delivery.

 

[fordtruckman2003]

I love the adaptive cruise. Never tried in stop and go not sure how to turn that on. My stop and go is up to 45 then stop, up to 50 then stop. Speed limit is much less than that but I'd be holding up traffic if I followed it.

 

[TSGarp007]

I love the adaptive cruise. Never tried in stop and go not sure how to turn that on. My stop and go is up to 45 then stop, up to 50 then stop. Speed limit is much less than that but I'd be holding up traffic if I followed it.

I don't think you should have to turn stop and go on... at least I did not with a '23 302A. Just set the adaptive cruise control like you always do. For my non-BC adaptive cruise control, when it comes to a complete stop, the adaptive cruise control essentially pauses. You have to press the x button, or whatever it is, to resume the adaptive cruise control. So, it's only sort of a stop and go cruise control since you have to take action to resume it. When I've used this on normal streets (not interstate highways) I have to press the x to resume. However, on a highway interstate I have noticed true stop and go, with no need to press the x button to resume. I guess the truck knows I'm on a highway with no red lights?

 

[Snakebitten]

I think it's based on how long the truck is in the stopped state.
If the Stop & Go traffic pace is consistent, and NOT resulting in a long stop, the resume button will not be required. I don't know how many seconds it is, but if stopped for enough time, you will see on the instrument cluster the notification that "resume" will be manually required to get going again.

I mess with this ACC feature on my daily commute. I often will have manually braked at a traffic signal. Once stopped behind another vehicle I hit the resume button while my foot is on the brake. Once the instrument panel notifies me with the "Stopped" alert, I can let off the brake pedal and let ACC hold the truck. It took me a while to trust the brake hold.

 

[TSGarp007]

I think it's based on how long the truck is in the stopped state.
If the Stop & Go traffic pace is consistent, and NOT resulting in a long stop, the resume button will not be required. I don't know how many seconds it is, but if stopped for enough time, you will see on the instrument cluster the notification that "resume" will be manually required to get going again.

I mess with this ACC feature on my daily commute. I often will have manually braked at a traffic signal. Once stopped behind another vehicle I hit the resume button while my foot is on the brake. Once the instrument panel notifies me with the "Stopped" alert, I can let off the brake pedal and let ACC hold the truck. It took me a while to trust the brake hold.

That's not how it has worked for me. On a non-interstate highway once it came to a complete stop (actually like you said after a second or something of actually being stopped), it shows the "press x to resume" or something like that message. Happened for 25 minutes consistently in stop and go traffic on a 2 mile stretch. Every single time I was fully stopped for more than a potato, I had to press the x to resume. Then I got on the interstate (also happened to be on a bridge). Still severe stop and go for a 3 mile stretch. It never required me to press the button to resume and it was real slow progress on the bridge. Stopped for way longer than a few seconds at a time. Never once had to "resume" the cruise control on the bridge. I was really surprised. I don't know what the truck is supposed to do, but I know what mine did.

 

[TSGarp007]

That's not how it has worked for me. On a non-interstate highway once it came to a complete stop (actually like you said after a second or something of actually being stopped), it shows the "press x to resume" or something like that message. Happened for 25 minutes consistently in stop and go traffic on a 2 mile stretch. Every single time I was fully stopped for more than a potato, I had to press the x to resume. Then I got on the interstate (also happened to be on a bridge). Still severe stop and go for a 3 mile stretch. It never required me to press the button to resume and it was real slow progress on the bridge. Stopped for way longer than a few seconds at a time. Never once had to "resume" the cruise control on the bridge. I was really surprised. I don't know what the truck is supposed to do, but I know what mine did.

Just hit stopped traffic briefly on the same bridge interstate today. Normally it says "stopped" and then "press X to resume" once the car in front of me moves. But on the interstate today when I came to a complete stop it instead only said "auto resume." I sat there for about 30 seconds and when the car in front of me started moving the truck automatically resumed speed from the complete stop. I'm guessing you need the map data to be current (valid subscription) for this to work? I've still got included maps from the initial purchase.

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