Adaptive Cruise control speed sign recognition

[Hash]

I've got a new to me '22 Lariat. I found the feature where you can turn on speed sign recognition, set the tolerances, and the cruise will adjust the vehicle speed to the settings I have input. Sometimes.... Is there a button I need to push to activate this when turning on the cruise? I haven't been able to get this to work all the time. When I turn the cruise on, it will sometimes set at the speed I'm currently traveling and other times it will adjust the speed to the last sign it read. I can't find anything on how to set it in the onboard manual other than turn on, set +/-, and resume. When that feature is turned on should it just work or do I have to input something else to get it to work? Thanks, hope this makes sense

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[Davexxxx]

After you turn it on, it will hold the speed you were at, until you pass a new sign.

 

[PNGento]

From my experience, if your foot is OFF the gas, it will set it to the existing speed, plus whatever tolerance you input. If your foot is ON the gas when you set the cruise, it will set to what was the speed at the time you set it. My speed recognition is pretty damn accurate. Rarely does it miss an actual speed limit sign. I am amazed when it ignores the signs that tell you of an upcoming limit change...these look just like a legitimate speed limit sign, but are smaller in size and have a border around them.

 

[PaulGrun]

Here’s my experience, gained after three years that included several road trips of long duration.
1. When first turned on, the ACC captures the speed I am currently traveling, Period. No tolerance factor included.
2. Whenever it sees a speed limit sign that varies from its current speed, it will adopt the new speed plus (or minus I suppose) the tolerance you have set.
3. Yes, it occasionally slows down unexpectedly by misreading a sign on a frontage road or wherever, but it is a simple matter to correct for this by mashing the gas pedal to keep moving at speed.

The latter has happened to me maybe half a dozen times, but has never been a source of concern for me. ACC is a driver assist feature, not self-driving so it doesn’t put me out at all to have to occasionally step on the gas to override. You can easily feel it the moment it begins de-celebrating and it’s easy to compensate.

the only time it caused a problem was when my foot was in my wife’s lap while she was gently pushing the cuticles back to give me a MANIcure.

I’M KIDDING about that part!

All things considered, I think the ACC including lane centering and speed control works very well. But you have to get used to the truck rushing up toward a line of stopped cars before gracefully slowing down. It even works well in stop and go traffic.

 

[PNGento]

Here’s my experience, gained after three years that included several road trips of long duration.
1. When first turned on, the ACC captures the speed I am currently traveling, Period. No tolerance factor included.
2. Whenever it sees a speed limit sign that varies from its current speed, it will adopt the new speed plus (or minus I suppose) the tolerance you have set.
3. Yes, it occasionally slows down unexpectedly by misreading a sign on a frontage road or wherever, but it is a simple matter to correct for this by mashing the gas pedal to keep moving at speed.

The latter has happened to me maybe half a dozen times, but has never been a source of concern for me. ACC is a driver assist feature, not self-driving so it doesn’t put me out at all to have to occasionally step on the gas to override. You can easily feel it the moment it begins de-celebrating and it’s easy to compensate.

the only time it caused a problem was when my foot was in my wife’s lap while she was gently pushing the cuticles back to give me a MANIcure.

I’M KIDDING about that part!

All things considered, I think the ACC including lane centering and speed control works very well. But you have to get used to the truck rushing up toward a line of stopped cars before gracefully slowing down. It even works well in stop and go traffic.

Couldn't have said it better. I love my ACC, but now love my Comma3x (Blue Cruise on steroids) even more.

 

[Xman]

I'm on the opposite side of the road on this one and lack appreciation for speed sign recognition (SSR). ACC - yes! SSR - no! Being caught by surprise when SSR recognizes out of the blue a slower MPH sign on the access road has happened too often for my liking (e.g. several times a week). Doing 75mph in traffic then having the truck decelerate to 45 is not appreciated. Also, there are many parts of the country where drivers totally disregards the 55mph signs. Not fun to be in tight with other vehicles doing 75 that never slow down when entering the 55 zone, another unpleasant experience.

 

[Walter Townsend]

Cruising down the highway at 80 KMPH and passed a 100 KMPH sign that the truck saw as 120 kmph and all of a sudden the truck lurched forward, or another time in a 90 kmph zone it saw a side street sign for 30 KMPH and tried to do a brake stand.

I learned very quickly that when using ACC to keep foot ready to maintain speed as it is worse when the truck slows quickly if someone is behind you, not expecting a brake stand!

I also keep my fingers on the up down arrows whenever I see a sign ready to compensate.

Overall I find that I use ACC most when in bumper to bumper traffic, or when following a nervous nelly that can not maintain the posted speed. The ACC radar works much better / quicker than I can to maintain the five car lengths distance, right up to stop, then restarts as traffic gets moving again.

Open road, most times just us the pedals!

 

[Xman]

Cruising down the highway at 80 KMPH and passed a 100 KMPH sign that the truck saw as 120 kmph and all of a sudden the truck lurched forward, or another time in a 90 kmph zone it saw a side street sign for 30 KMPH and tried to do a brake stand.

I learned very quickly that when using ACC to keep foot ready to maintain speed as it is worse when the truck slows quickly if someone is behind you, not expecting a brake stand!

I apologize if this is already understood. ACC and SSR are two separate functions. ACC must be enabled for SSR to function. However, ACC can operate independently by disabling SSR on the center control panel. Then the cruise control will not have speed sign inputs and only cruise at your desired/selected speed while adjust to slower traffic in front of you.

 

[Hash]

Thanks guys! I'll try the foot off the gas trick when setting the cruise and see what happens. Sometimes this thing seems to have a mind of it's own, LOL.

 

[JoeSuff]

I don't like the SSR, dunno if they improved it in an update. However, took me a while to realize if you long hold the cruise button it jumps x5's mph instead of 1mph for each push. Once i got my fingertip memory to do it without thinking its been a game changer for me.

Cause pushing down on the pedal is so much extra when you're just trying to chill and not give 2 f's.

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