I found the automatic speed change to be so unusable that I disabled it through the settings after about a week of use. Among the catalog of faults it had back in 2022 (I haven’t enabled it since):

• It sometimes mistook truck speed signs for regular speed limit signs.
• It had no clue about "end speed zone" signs.
• It did not know that school zone speed limits are not in effect when school is not in session. You know, at 2 AM.
• Fairly often it apparently forgot the last sign it saw and reverted to some number apparently stored in an internal database. The speed it reverted to could be either far slower or far faster than the actual speed limit.
• It sometimes picked up the speed sign on an adjacent service road parallel to the freeway.

I found it a safety hazard and can’t believe that anyone in their right mind would leave it on.

At first I tried setting the cruise control to a couple MPH above the actual speed limit as that was supposed to make it ignore the speed signs but I don’t normally speed (yeah, I am one of those) so that bothered me. So I ended up permanently turning it off in the vehicle settings. I don’t recall where that setting is in the controls to disable it because it has been so long since I did it, but it is in there somewhere.

Regarding getting an email about a speed alert from Bluelink: I read the terms and conditions on that safe driver and decided I wanted nothing to do with it so never set it up. It means I don’t get a score saying how safe or unsafe I am. But it also means my personal profile is not being sold by Hyundai.

With respect to the 272 recall for the ICCU, that will have no effect on the automatic speed limit function.

 

The speedo overreads by about 3mph at 70, so if your cruise control is set to 73 you will be doing about 70 actual mph. Or you could set it to 69.

The automatic limit set feature is so badly designed though. There's no way to know if a given speed limit change will be performed automatically by the car or not - on the A11 it does not, but on the A14 it seems to. There should be a different bong for each situation because if you press the rocker when you shouldn't, you'll end up on the wrong speed. It's also possible to respond too quickly or too slowly - if the change is as you exit a roundabout you can be too late if you wait to straighten the wheel!

And then there is the fact that there is no separate setting for "let me manually confirm a speed limit change with the rocker switch" and "[sometimes] automatically change the limit"!

 

Imagine driving on a freeway at 70mph and suddenly you have no power until your speed reaches 20 mph!

I was told that when using the speed limit function it was still possible to override that and regain power immediately by a 'kickdown' on the accelerator. I've never tried that yet so must remember to give it a go soon - in case its needed. As in the incident above.

 

I’m in the dealers waiting room while recall 272 is being performed. The service tech said that they just got an update to 272. ??? But IMHO, it probably will not correct my real problem of the intermittent turn-on of the Speed Limit function. Normally the Speed Limit can be actuated by a long push of the Cruise Control button on the steering wheel but in my situation it turns itself on all by itself which can lead to a very dangerous situation.
Imagine driving on a freeway at 70mph and suddenly you have no power until your speed reaches 20 mph!
It has happened to me on 3 occasions now - fortunately with no serious consequences.
But as an interesting side light, today I got an email alert from Bluelink saying that yesterday they received a Speed Alert. This is the first time that big H has done this.
Has anyone received a BL Alert via email?

I've had a couple of those unexpected speed limit changes happen to me several times over the years. The first time, still new to the car, I freaked out that the car "lost power". Tried the same setting (ACC/HDA set to speed limit) the next day and it happened again and it showed the change on the Speed Limit display. The actual posted speed was 65 and it changed to 55 for a few hundred feet. It was bc there used to be a construction zone with a 55 limit. To get around it, I set the Speed 1 above or below. It's an issue with BlueLink and Nav data being outdated (even if u don't use active Nav). This issue went away after 2 updates. Another one arose later on, after a Nav update, where the HDA logo turned on/green (speed was not set to speed limit) and the car decelerated drastically. Happened every day in the same section. So, I had to make sure I hit the pedal to not lose speed in that zone. I reported it to BlueLink/ Nav but it also took 2 rounds of updates to go away. They don't seem to have the latest data on construction projects. Now, it shows me a Speed Limit of 55 for 20 miles past a construction zone end. Also, some days it shows the correct speed zone data and changes and the next it doesn't. Not sure why but I would also consider it a safety issue if ur car suddenly and drastically decelerates for aparent no reasons.

 

This issue went away after 2 updates. Another one arose later on, after a Nav update, where the HDA logo turned on/green (speed was not set to speed limit) and the car decelerated drastically. Happened every day in the same section. So, I had to make sure I hit the pedal to not lose speed in that zone. I reported it to BlueLink/ Nav but it also took 2 rounds of updates to go away. They don't seem to have the latest data on construction projects. Now, it shows me a Speed Limit of 55 for 20 miles past a construction zone end. Also, some days it shows the correct speed zone data and changes and the next it doesn't. Not sure why but I would also consider it a safety issue if ur car suddenly and drastically decelerates for aparent no reasons.

From my experience with a 2022 US Limited RWD:

1) I quit using the CC / speed limit assist shortly after getting the I5 because: A) I nearby speed limit sign of 55 had graffiti to make it look like 88, and my I5 accelerated like Marty McFly trying to reach time traveling speed. LOL B) I prefer to drive 10 mph over the limit, not just 5 mph. LOL So for most of the 2.5 years I've had the I5 I haven't seen the green steering wheel display.

2) About the I5 knowing what the current speed limit is, IMHO it's not a Nav update that fixes corrections, but the passage of time (or the passage of enough Hyundai's with speed limit sensors to see the changes). Even though I don't have my CC set to adjust with the speed limit, I still every now and then look at the speed limit in my HUD. Like you, I can see that it sometimes remembers old speed limits in an area (construction, or just a general speed limit change). I take that to be the programmers not assuming the I5 can always see the speed limit sign. Think of the times you're on a multi lane highway and pass by a speed limit sign showing a speed limit change because you're getting near town. Sometimes, a truck might be between you and the sign, blocking your view. The I5 programmers know that, and thus program it to remember the limit changes for a while. No doubt not just retained in my I5's memory, but uploaded to a database so that other Hyundai's will know it too. But in time if enough Hyundai's pass by it and don't see the old speed limit sign, my I5 will realize that the old speed limit no longer exists. I've seen that first hand with construction zones arriving for a while and then leaving when the job is done (as you've seen). And I've seen it with an old speed limit sign removed. On the rural highway heading to my home, the speed limit is 65 for miles, then drops to 55 for about 3/4 a mile, then to 45 mph. The 55 speed limit has been missing for years, but for a while my I5's HUD would display 55mph speed limit, then 45 when I passed that sign. Only recently did enough times of us few new Hyundai owners in my rural area passing by the missing sign make the algorithm decide that the speed limit sign was no longer there (it wasn't just blocked from our view). So now my HUD displays 65 for a while, then to 45, just like the real life signs do.

 

I have the Speed Limit set to Off.
There are no speed limit sings in the areas where the Limit takes over
The number displayed when this happens seems random.
it has not happened since update 272

 

I’m in the dealers waiting room while recall 272 is being performed. The service tech said that they just got an update to 272. ??? But IMHO, it probably will not correct my real problem of the intermittent turn-on of the Speed Limit function. Normally the Speed Limit can be actuated by a long push of the Cruise Control button on the steering wheel but in my situation it turns itself on all by itself which can lead to a very dangerous situation.
Imagine driving on a freeway at 70mph and suddenly you have no power until your speed reaches 20 mph!
It has happened to me on 3 occasions now - fortunately with no serious consequences.
But as an interesting side light, today I got an email alert from Bluelink saying that yesterday they received a Speed Alert. This is the first time that big H has done this.
Has anyone received a BL Alert via email?

I've had a couple of those unexpected speed limit changes happen to me several times over the years. The first time, still new to the car, I freaked out that the car "lost power". Tried the same setting (ACC/HDA set to speed limit) the next day and it happened again and it showed the change on the Speed Limit display. The actual posted speed was 65 and it changed to 55 for a few hundred feet. It was bc there used to be a construction zone with a 55 limit. To get around it, I set the Speed 1 above or below. It's an issue with BlueLink and Nav data being outdated (even if u don't use active Nav). This issue went away after 2 updates. Another one arose later on, after a Nav update, where the HDA logo turned on/green (speed was not set to speed limit) and the car decelerated drastically. Happened every day in the same section. So, I had to make sure I hit the pedal to not lose speed in that zone. I reported it to BlueLink/ Nav but it also took 2 rounds of updates to go away. They don't seem to have the latest data on construction projects. Now, it shows me a Speed Limit of 55 for 20 miles past a construction zone end. Also, some days it shows the correct speed zone data and changes and the next it doesn't. Not sure why but I would also consider it a safety issue if ur car suddenly and drastically decelerates for aparent no reasons.

From my experience with a 2022 US Limited RWD:

1) I quit using the CC / speed limit assist shortly after getting the I5 because: A) I nearby speed limit sign of 55 had graffiti to make it look like 88, and my I5 accelerated like Marty McFly trying to reach time traveling speed. LOL B) I prefer to drive 10 mph over the limit, not just 5 mph. LOL So for most of the 2.5 years I've had the I5 I haven't seen the green steering wheel display.

2) About the I5 knowing what the current speed limit is, IMHO it's not a Nav update that fixes corrections, but the passage of time (or the passage of enough Hyundai's with speed limit sensors to see the changes). Even though I don't have my CC set to adjust with the speed limit, I still every now and then look at the speed limit in my HUD. Like you, I can see that it sometimes remembers old speed limits in an area (construction, or just a general speed limit change). I take that to be the programmers not assuming the I5 can always see the speed limit sign. Think of the times you're on a multi lane highway and pass by a speed limit sign showing a speed limit change because you're getting near town. Sometimes, a truck might be between you and the sign, blocking your view. The I5 programmers know that, and thus program it to remember the limit changes for a while. No doubt not just retained in my I5's memory, but uploaded to a database so that other Hyundai's will know it too. But in time if enough Hyundai's pass by it and don't see the old speed limit sign, my I5 will realize that the old speed limit no longer exists. I've seen that first hand with construction zones arriving for a while and then leaving when the job is done (as you've seen). And I've seen it with an old speed limit sign removed. On the rural highway heading to my home, the speed limit is 65 for miles, then drops to 55 for about 3/4 a mile, then to 45 mph. The 55 speed limit has been missing for years, but for a while my I5's HUD would display 55mph speed limit, then 45 when I passed that sign. Only recently did enough times of us few new Hyundai owners in my rural area passing by the missing sign make the algorithm decide that the speed limit sign was no longer there (it wasn't just blocked from our view). So now my HUD displays 65 for a while, then to 45, just like the real life signs do.

Ur first item about the graffiti is interesting. I saw on Hyundai videos that cars can read traffic signs but didn't think that it was on US models. Maybe on higher trims like urs but not mine. If mine could do that I'd say "go back to school and learn to read numbers".
As said, sometimes it remembers, like today, when a construction zone ends and the speed changes. Not sure if it will tomorrow.
As for rural Highways- we had an incident where we were on a State Route, still within town limits with houses and sidewalks, speed limit of 45 but the dash and Nav screens showed a limit of 65 (for 0.5 mi). It didn't accelerate luckily, that could have been ugly. Strangely, we were on SR65. And, it was on my wife's Kia Niro EX - sister software with similar issues (her car had the same issue as my car (previously described) on same spot on our freeway).
As for using ACC and some HDA features - I use it a lot, especially in evening drive home bc of sleepiness. Keeps me on the road for my 38mi drive. But, it has kinks.
For one, I experienced multiple times, the car has problems recognizing traffic has come to a dead stop (no issues if it creeps slowly). I have the radar on 3-4 bars, speed set to 70, the Fwy curves slightly left than right. I can see the traffic has stopped from a mile away but the car barrels down the road. By the time it "sees" the stopped cars ahead and starts regen braking it's quite close, too fast and I received the collision warning, having to hit the brakes. Other times I hit the brakes earlier bc it does not appear to slow down early enough (as said if there is slightest movement ahead, it has no issues slowing down and stopping). Other times, HOV lane in front of me is free and clear, lane next to me has stopped, lane curves slightly to the left and the car hits the brakes.
I do like to use the ACC for stop-n-go traffic. Slows me down and keeps distance if someone cuts in front of me (all the time), stops when the car in front stops, continues when the car in front continues to drive. But, it has kinks too, I haven't figured out any logic. Sometimes, car in front stops, my car stops, car in front moves, my car moves (even after sitting there for like a minute). Other times, car in front stops and I get msg on dash pretty much right away to press accelerator pedal or +/- toggle switch to continue driving (I mean, that's all I have to do besides holding the steering wheel).
If u figured out some of those kinks and work around it, it's quite useful but I would not use it as "self drive mode".

 

Ur first item about the graffiti is interesting. I saw on Hyundai videos that cars can read traffic signs but didn't think that it was on US models. Maybe on higher trims like urs but not mine.

My 2022 Limited can definitely read the speed limit signs.

Unfortunately, it sometimes reads and acts truck speed limit signs. It doesn’t know about "End Construction” and other similar signs that mean you can resume the normal speed. It doesn’t know about time of day or day of week restrictions like school zones.

And worse, at some distance which seems to vary between 1/4 mile and 1/2 mile, it seems to forget the sign it correctly identified and decide to go at a speed apparently saved in its map data. And the map data speed limit information is woefully incorrect for non-freeway, non-major highways.