I have not noticed that specific behavior.

But I have noticed that it seems to default to a speed it apparently has stored internally sometimes even if we have just passed a speed limit sign that it correctly read. For example on one 40 MPH road I know of it will indicated 55 MPH until I pass a 40 MPH speed limit sign. It then correctly indicates 40 MPH for a short while then reverts to the incorrect 55 MPH even though the road character has not changed and there has been no speed limit sign.

I strongly suspect that the exact behavior will change each time there is a navigation update because that will update the stored road information which includes speed limit information.

 

For example on one 40 MPH road I know of it will indicated 55 MPH until I pass a 40 MPH speed limit sign. It then correctly indicates 40 MPH for a short while

(Apologies for the side topic...) I wish all cars with knowledge of speed limits (and this includes ioniq and Tesla) would change speed down to the indicated maximum before crossing the speed sign.

Here (and probably in most places) you will be ticketed if you pass the sign without already having slowed down (assuming there's a cop nearby). Many years ago there was a policy of a short distance grace, but not any more.

 

in 2020 we bought a sonata, the first car we have ever had with factory nav. one place we pass at least once a day, the nav has it as a school zone, with lower speed limit. in 2020, that school had burned down at least 3 years before, and there no longer was a school zone. today, we still pass by, and it still shows school zone, and reduced speed limit. also, very near the same place, the freeway used to be 55 years ago. it is now 70, but nav still shows 55. i sent numerous notices to the nav place, but no change. yet

 

Hello,

My 2023 (US model) Ioniq 5 has a strange quirk with the speed limit reported on the nav system map (and HUD).
If I am driving on a road that has a sufficient bend (maybe 45 degrees or so) in it, the speed limit on the nav map will just disappear until it the car passes another posted speed limit.

I recently had an OTA update (I'm on NEEV23.USA.S5W_M.V010.003.230526 after the update according to the info reported by the car). So now it seems like instead of the speed limit just disappearing from the nav map, it just changes to 25 mph on a sufficient curve and even after some traffic circles (roundabouts), and the speed limit is most definitely not 25 mph in these areas so I'm not sure why it arbitrarily chooses this speed limit value.

Anyone else notice similar behavior?

That would be welcome given HDA's tendency to speed up in curves .

 

Good to know it's not just my car that has problems with speed limit reporting!