Wrong Corrected Speed

[pipcorona]

So I added two speed limits on my TomTom Go 930 tonight for two different roads. One was 35mph and the other was 30mph. After adding them, on the road where I put the speed as 35mph the TomTom displayed the speed limit as 34mph and on the road where I put 30mph it displayed 31mph. I went in to correct the speeds again and it showed 35 and 30. Any ideas why the TomTom is doing this?

 

[dhn]

TomTom has a problem in its algorithm when it takes an inputted speed and converts it to kph behind the scenes and converts it back to mph for display purposes. Known issue.

 

[seaners]

Wirelessly posted (BlackBerry Curve 8330: BlackBerry8330/4.5.0.131 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/126 UP.Browser/5.0.3.3)

Yeah I have mine set for km which displays properly, but when I touch the screen for voice directions it will say "turn left in 2 miles".

 

[doctormstein1]

mph errors

So I added two speed limits on my TomTom Go 930 tonight for two different roads. One was 35mph and the other was 30mph. After adding them, on the road where I put the speed as 35mph the TomTom displayed the speed limit as 34mph and on the road where I put 30mph it displayed 31mph. I went in to correct the speeds again and it showed 35 and 30. Any ideas why the TomTom is doing this?

Got same errors like 31 in a 30. Sent to tech support but no answer for this problem. If you know tomtom as I do, you might as well forget about this problem for about 10 years

 

[forgie]

I have my TomTom 730 set to use MPH. Does anyone know how the TomTom is converting that speed when doing speed correction? Right now if I put in the correct MPH it comes out incorrect after the conversion. If I knew how the conversion worked I could just put in the wrong MPH speed and hopefully it would turn out correct when displaying on the TomTom. Seems like a pretty trivial little bug, why hasn't this been fixed.

 

[dhn]

Who knows? The software converts from mph to kph and then back again to mph. The code seems to truncate rather than round values.

 

[tukatz]

See my message at the top of page three of this thread.
https://www.tomtomforums.com/general-tomtom-discussion/11446-speed-limit-street-3.html
As noted, it is a programming error and there is nothing you can do to correct for it.