Adaptive cruise question.

[ITCharleston]

I'm testing it also. It can be annoying but there are times it has saved me. There is a 1 mile 35 mph town in the middle of a 20 mile stretch that's 55 mph.

We have a Hwy 30 that it will read as 30 mph when it is actually 55. I am aware of the location and anticipate it.

I have also thought that 2 profiles would be a great addition. Under 45 doesn't need the same buffer that I want for 50 and over.

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[tmark]

Not sure what you guys are talking about. My ACC only brakes for traffic ahead. It DOES recognize speed limit signs and displays that for your convenience, but does not react to it.

 

[Buyer2021]

Sure, all of the mentioned anomalies / quirks associated with ACC + sign-recognition happen on occasion (speed set different from posted signs, sudden slow-down / braking when posted speed drops radically, etc, etc).

Personally, I drive with my right-hand on the wheel where a thumb-press of the raised 'disable ACC' button is quick and almost subconscious action when needed.

I routinely hit 'disable' when I'm approaching a sudden speed-reduction sign and modulate deceleration with the pedal, no worries.

For me it's a driver aid, not autonomous driving (thank goodness!) and I treat it as such, still giving my attention to the task of driving.

All-and-all I like it a lot, use it 95% of my daily-driving time, and am thankful for it (especially the automatic adjustment when approaching slower or stopped vehicles).

YMMV, no worries!

 

[Piflo1701]

Confirming the brake lights come on. I turned on the "bed view" camera while on the highway and watched for the red reflection in the bed.

 

[PaulGrun]

You can cancel cruise control in anticipation of an upcoming speed limit change, and if you time it right you'll be doing exactly your desired speed as you cross the change and can re-enable cruise (which is now set to the speed you are currently going). I think someone said a new BC update does exactly what you explain, but I bailed long before updating.

But what a headache.

I began doing exactly this on last summer’s roadtrip.
U.S. 20 passes through numerous small towns, so rather than wait for the truck to throw out the anchor when it sees the reduced speed limit at the edge of town, I’d thumb the “cancel” button at the sign that says “reduced speed ahead”, coast, and then thumb the button again as we pass the speed limit sign.

Letting the truck do it by itself works, but this method gives us a smoother more pleasant ride.

I don’t look at it as a headache, I look at it as a kind of partnership between me, the driver, and an imperfect but still very helpful driver assist.

as they say, YMMV, or, to each his own.

 

[ginosega]

I turned sign recognition off too, and control my speed with either the buttons on the steering wheel to make minor adjustments and stay in cruise control, or by pressing the brake pedal to cancel cruise control. If I'm entering a construction zone and the speed drops drastically I don't want cc on anyway.

 

[hpwjr]

Does the speed limit function actually read signs or is it he speed limit just programmed into map navigation for any given stretch of road? To me it seems purely in the map data base because it reacts to old construction zones (they were widening the interstate near me for a few years so lots of old lowered speed limits used to be through the area) yet the construction is now over and all lowered speed limit signs have been removed for a year. It seems the old construction zone limits are embedded in the map until a new update comes out. I’ve never had it clearly read a sign. Such as when going through a new construction zone, the truck doesn’t pick up the temporary signs. Though I’m not at all certain, I’ve just about concluded that it really never actually reads signs but is just reacting to the data embedded in each map update. Does someone really know how it operates. I’m all ears.

 

[Davexxxx]

Does the speed limit function actually read signs or is it he speed limit just programmed into map navigation for any given stretch of road? To me it seems purely in the map data base because it reacts to old construction zones (they were widening the interstate near me for a few years so lots of old lowered speed limits used to be through the area) yet the construction is now over and all lowered speed limit signs have been removed for a year. It seems the old construction zone limits are embedded in the map until a new update comes out. I’ve never had it clearly read a sign. Such as when going through a new construction zone, the truck doesn’t pick up the temporary signs. Though I’m not at all certain, I’ve just about concluded that it really never actually reads signs but is just reacting to the data embedded in each map update. Does someone really know how it operates. I’m all ears.

I think it must be both, because I know about the old construction zones you're talking about but mine has also picked up new ones. Like, that day's change.

 

[hardcore]

Not sure what you guys are talking about. My ACC only brakes for traffic ahead. It DOES recognize speed limit signs and displays that for your convenience, but does not react to it.

Definitely concur. Have used ACC across thousands of speed limit changes, in multiple vehicles, and sign recognition is always on. Never had it change the set speed because of speed limit changes, no matter how dramatic. Only time it ever changes speed is when the vehicle gets to close to the one in front.

 

[PaulGrun]

Definitely concur. Have used ACC across thousands of speed limit changes, in multiple vehicles, and sign recognition is always on. Never had it change the set speed because of speed limit changes, no matter how dramatic. Only time it ever changes speed is when the vehicle gets to close to the one in front.

From page 340 in the owners manual for a '22 XLT. Details on turning it on or off are on the next couple of pages.

Long story short, the system is most definitely capable of modifying the vehicle speed based on speed limit sign recognition.

Enjoy!

"HOW DOES INTELLIGENT ADAPTIVE CRUISE CONTROL WORK Intelligent adaptive cruise control combines speed sign recognition and navigation map data with adaptive cruise control to adjust the cruise set speed to the speed limit detected by the speed sign recognition system. As the system detects new speed signs, the set speed updates. There are limitations that affect the accuracy of the speed sign recognition system and its ability to determine the current speed limit. The intelligent adaptive cruise control system and its ability to determine the current speed limit shares these limitations. Note:The adaptive cruise control gap setting operates normally when the"

 

[Snakebitten]

I think the confusion is that just because your instrument panel is still displaying the speed limit sign recognition, doesn't mean your cruise control necessarily adjusts speed relative to the sign recognition.

The feature that you can turn on/off is specifically tieing the rate of speed to the sign recognition.

I have the feature turned off.
But I still have speed limit sign recognition on the instrument cluster. But the sign has no influence on the cruise control rate of speed setting.

 

[ginosega]

I think the confusion is that just because your instrument panel is still displaying the speed limit sign recognition, doesn't mean your cruise control necessarily adjusts speed relative to the sign recognition.

The feature that you can turn on/off is specifically tieing the rate of speed to the sign recognition.

I have the feature turned off.
But I still have speed limit sign recognition on the instrument cluster. But the sign has no influence on the cruise control rate of speed setting.

Correct. The feature that I have turned off in the Features menu in Sync is labeled "Speed Sign Recognition" and its description is "Automatically adjusts your set vehicle speed to the posted speed limit and selected tolerance." I turned that off because I do not want my truck to automatically adjust speed for me. With it off though, the speed signs are still shown on my dashboard and they do react to temporary / construction signs. So the camera recognition is still active even with that setting off.

 

[HammaMan]

Here's some tips for those of you using or refusing to use the systems for whatever reason.

- The throttle overrides the auto braking and other nanny systems that slow the vehicle AND it's variable. As such you can use the throttle to adjust the rate of deceleration. The more you tip in the less braking it does. This will also cancel out auto emergency braking like when a car that's just touching your lane from an adjacent lane triggers it.

- You can begin adjusting the cruise speed down before you hit the sign, particularly when the warning sign about the reduction in speed passes you.

- You can cancel cruise control ~300' before the speed drop and turn it back on once your coast and the new speed limit are within 3 mph -- it's a simple press of cancel/resume as appropriate.

- The above throttle tip in is good for adjusting / accelerating pacing distance of radar cruise, especially if you have to be aggressive in traffic, particularly around accelerations as the system is far too slow to accelerate.

I'd suggest 'playing' with how the 'automated' system responds to your use of the throttle. ADAS L2 isn't autonomous, but you can be trained to operate it in a manner other than it just being on or off. It's a much better experience in the EV than the F150 simply due to 1 pedal driving using regen. Handing the braking back to the vehicle during a braking event is much easier

 

[hardcore]

From page 340 in the owners manual for a '22 XLT. Details on turning it on or off are on the next couple of pages.

Long story short, the system is most definitely capable of modifying the vehicle speed based on speed limit sign recognition.

Enjoy!

"HOW DOES INTELLIGENT ADAPTIVE CRUISE CONTROL WORK Intelligent adaptive cruise control combines speed sign recognition and navigation map data with adaptive cruise control to adjust the cruise set speed to the speed limit detected by the speed sign recognition system. As the system detects new speed signs, the set speed updates. There are limitations that affect the accuracy of the speed sign recognition system and its ability to determine the current speed limit. The intelligent adaptive cruise control system and its ability to determine the current speed limit shares these limitations. Note:The adaptive cruise control gap setting operates normally when the"

There is what the manual says and what it actually does. And we all know those things don't always align, especially after updates. I may case if there had been abrupt speed changes due to speed limit changes, I would have worn several gallons of hot coffee with quite a few burns by now and my backseat drivers would have definitely let me know about those changes instead of letting me know I have not slowed down [soon enough].

That said, going to have to got with snakebitten on this one. More than likely I have the settings described in that post. I just haven't actually remembered to check. Maybe one day I will remember.......... maybe.

 

[PaulGrun]

There is what the manual says and what it actually does. And we all know those things don't always align, especially after updates. I may case if there had been abrupt speed changes due to speed limit changes, I would have worn several gallons of hot coffee with quite a few burns by now and my backseat drivers would have definitely let me know about those changes instead of letting me know I have not slowed down [soon enough].

That said, going to have to got with snakebitten on this one. More than likely I have the settings described in that post. I just haven't actually remembered to check. Maybe one day I will remember.......... maybe.

I’m somewhere north of 99% sure that if you follow the instructions in the owner’s manual (snakebitten referred to essentially the same instructions) that the system will perform as expected. I can say that I am 100% sure based on the way my ‘22 XLT 302a behaves.
But you do you.

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