Truck slowing down on curved roads while using BlueCruise

[jthiesse13]

This just started. For some reason, my truck slows down while using bluecruise when going around curved roads or freeway transitions. Super annoying especially for people behind me. My truck didn’t do this until recently. I don’t recall changing any settings. Does anyone have any suggestions on why this is happening?

TIA.

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[Scorpio3d]

That was a change in one of the BC updates from what I recall! You can always just push down on the accelerator.

 

[Tony Burgh]

If you see a series of sign posts with arrows pointing out the curve, push on the accelerator to maintain speed.
Yes, extremely annoying.

 

[PJnc284]

Do you have speed sign recognition (where it adjusts to speed limit signs) turned on in the settings? That was part of 1.4 as mentioned. You should be able to disable the sign recognition and it not flip out for curves anymore. Otherwise, you'd need forscan to manually disable it if you still wanted to use the sign recognition.

 

[chriserx]

Afaik it's tied to the setting that automatically follows the speed limit under adaptive cruise control, I have a comma now but from what I remember it controls both posted speed and curve speed.

 

[chriserx]

Do you have speed sign recognition (where it adjusts to speed limit signs) turned on in the settings? That was part of 1.4 as mentioned. You should be able to disable the sign recognition and it not flip out for curves anymore. Otherwise, you'd need forscan to manually disable it if you still wanted to use the sign recognition.

Is there a forscan method to have speed limit recognition but not adjust automatically for curves? Cuz I'd love to have that.

 

[PJnc284]

Is there a forscan method to have speed limit recognition but not adjust automatically for curves? Cuz I'd love to have that.

Should be 2 by default. Not sure what the difference is between Legacy and Preview but I changed it to 1. I got tired of the Predictive Speed Assist picking up random signs as the speed limit so I keep it all disabled now though.

 

[digitaldad]

@PJnc284 can you confirm - if changing a "2" from example to "1" above?

* does BC now disengage in said/same curve
* or BC stays engaged but doesn't slow down

Reason I ask is, I tried this setting this last week and found my BC was disengaging around a slight curve on a highway near my home (that hadnt ever disengaged BC before).

To be fair, I was looking at your recent posts on this and the others posts around curve control menu. I'm up-to-date with modules (FDRS) as of late September. Even though I enabled, I could never find it in my menu (assumed ACC sub-menu).

Combining the curve control menu and the above, they may have been the reason for my issue but I ended up restoring both the APIM/IPMA saves and am back to where I was.

 

[chriserx]

@PJnc284 can you confirm - if changing a "2" from example to "1" above?

* does BC now disengage in said/same curve
* or BC stays engaged but doesn't slow down

Reason I ask is, I tried this setting this last week and found my BC was disengaging around a slight curve on a highway near my home (that hadnt ever disengaged BC before).

To be fair, I was looking at your recent posts on this and the others posts around curve control menu. I'm up-to-date with modules (FDRS) as of late September. Even though I enabled, I could never find it in my menu (assumed ACC sub-menu).

Combining the curve control menu and the above, they may have been the reason for my issue but I ended up restoring both the APIM/IPMA saves and am back to where I was.

So does it fully disengage or do it tell you to put your hands on the wheel, if its the latter then that'd be expected behavior if slowing for a turn is disabled. The truck thinks the torque on the steering wheel and/or the traction into the turn will be too much so it warns to keep your hands on the wheel. If it is something else you're asking, my apologies.

 

[PJnc284]

@PJnc284 can you confirm - if changing a "2" from example to "1" above?

* does BC now disengage in said/same curve
* or BC stays engaged but doesn't slow down

Reason I ask is, I tried this setting this last week and found my BC was disengaging around a slight curve on a highway near my home (that hadnt ever disengaged BC before).

To be fair, I was looking at your recent posts on this and the others posts around curve control menu. I'm up-to-date with modules (FDRS) as of late September. Even though I enabled, I could never find it in my menu (assumed ACC sub-menu).

Combining the curve control menu and the above, they may have been the reason for my issue but I ended up restoring both the APIM/IPMA saves and am back to where I was.

I didn't notice it disengaging but it will feels it's applying too much torque as mentioned.

 

[digitaldad]

So does it fully disengage or do it tell you to put your hands on the wheel, if its the latter then that'd be expected behavior if slowing for a turn is disabled. The truck thinks the torque on the steering wheel and/or the traction into the turn will be too much so it warns to keep your hands on the wheel. If it is something else you're asking, my apologies.

Bah, I could have explained that better...BC never turned off completely. It would tell you to place hands on the wheel for the turn, and shortly after BC would then "re-engage" for hands-free (or I have to press "ok" again, can't recall).

I think this was how it was on pre BC 1.4. I had assumed these settings (being on 1.4) allowed hands-free and disable the slow downs, while keeping hands-free on/engaged.

Back to the point of 706-02-02 xxxx xxxx x*--, I had thought that's what setting 0 experience would have been.

 

[bc1]

I frequently encounter one of those curves that should have Daytona banking, but doesn't, with no signs but it is obvious from the camera view and I either power on thru it if in a hurry or let it go if I'm not. It also depends on which lane I'm in.

I notice BC does the hands on all the time on the turnpike every time I go under one of those picture taking telemetry overheads that keep track of tolls. Anymore I either already have one or both hands on the wheel but I put the visor down or cover my face with one hand for the camera.

I've run into a construction area with no marking and when BC shuts down it's obvious and lets you know going off cruise control. Same thing when messing with the sync screen or rubber necking at the scenery, it will shut down and let you know cause it goes off cruise control. I use one-pedal so going off cruise control is really obvious when it starts slowing down in a hurry.

After previous close encounters of the eighteenth kind, I always have at least one hand on the wheel ready to go when passing a vehicle and maybe two for an 18 wheeler. These Kansas winds blow them trucks all over the road sometimes and I've encountered sleepy truck drivers.

 

[rugedraw]

That is predictive speed assist. It can be turned off in the driver assistance > cruise control menu.

I have found that even if you turn it off, it still does it, but you can fully disable it with FORScan using the change @PJnc284 mentioned. Before BC 1.4, that value was a 0, but changing it to a 1 would also disable it.

 

[brewski]

When this happens there is an additional speed limit sign on your screen.
Something they call safety.
While I kind of don't like it, there have been a few times (before this upgrade) on an overpass curve where the truck did not slow. Had I not intervened it could have gotten very ugly.
This is a good thing. If you turn it off, don't complain when you find yourself in the wall.

 

[chriserx]

When this happens there is an additional speed limit sign on your screen.
Something they call safety.
While I kind of don't like it, there have been a few times (before this upgrade) on an overpass curve where the truck did not slow. Had I not intervened it could have gotten very ugly.
This is a good thing. If you turn it off, don't complain when you find yourself in the wall.

I personally wouldn't have a problem with it if
A) It were less conservative about it, slowing to 52 in a 60 on the interstate, not hauling in clear, fair weather is too much.
B) Didn't have 'ghost' slowing, where it shows the curve popup and slows for a nonexistent curve.

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