Junction instructions wrong but map is correct (TT1000)

Mr-B

Hi

My new TT1000 has an intermittent issue in that sometimes it speaks the wrong instructions at a roundabout i.e. it says to take the first exit, but the map shows the correct route. The junction icon also shows the wrong roundabout exit. I'm running App 10.111.647853.74 with Map Europe v865.3243.

I've logged it with TT support, but they seem to explain it away with incorrect maps, corrupted voices etc. :-(

Has anyone else seen this?

Andy_P · Posted: Mon Apr 04, 2011 10:54 am Post subject:

Can you give an example so we can check to see if it happens on ours? (we may have different map and software versions)

The easiest way to describe it to others is to give a Latitude and Longitude for the roundabout - you can set your "View map" screen to show the coordinates by tapping "Options / Advanced" at the bottom of that screen and selecting "Coordinates".
Much quicker than having to work it out from a description!

Mr-B · Posted: Mon Apr 04, 2011 11:16 am Post subject:

Not sure about getting the Lat/Long as I'm not doing that route for a few days and the online maps don't appear to display it, but it happened when travelling down the M40 southbound and exiting at junction 4 Handy Cross on a route to the M4. It said (and the icon shows) to take the A4010 1st exit when in fact the map route correctly indicated to take the 3rd exit A404 south.
http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=handy+cross&aq=&sll=52.285754,-1.530934&sspn=0.010645,0.018153&ie=UTF8&hq=&hnear=Handy+Cross,+Little+Marlow,+Buckinghamshire,+United+Kingdom&ll=51.612634,-0.768957&spn=0.010806,0.018153&z=16

I've just tried the route demo but it doesn't speed up when on a long M-way section, so it'd take too long to get to that junction!
Then I tried Show Route Summary which shows an overview map, but when I click on Details, it goes back to the menu. :-(

Mr-B · Posted: Mon Apr 04, 2011 11:51 am Post subject:

OK I found how to replicate this on my TT1000.
Plan a route from somewhere north on the M40 to, say Slough.
Then View Route, Show Instructions. It shows:

...
turn left - M40 London
exit left - 4 Maidenhead [I presume this means Junction 4]
take 1st exit - A404 Slough
straight ahead (2nd exit) - A404 Maidenhead
etc.

The 1st exit - A404 Slough should be take 3rd exit towards A404 Slough.

I've also seen this issue on another A-road roundabout.

Andy_P · Posted: Tue Apr 05, 2011 9:29 pm Post subject:

M8TJT · Posted: Tue Apr 05, 2011 10:58 pm Post subject:

iGO does something similar. On the approach up the slip road it says turn RIGHT, and does not seem to think there is a roundabout untill it has passed the slip back on to the M40, then it says take first exit, but this is as you go over the M40, so it IS the first exit Shocked

It's seems to me that it's fairly obviously a mapping error Sad

Guivre46 · Posted: Tue Apr 05, 2011 11:08 pm Post subject:

Are the other two exits/entries on the roundabout shown as blocked in someway? Has mapshare struck again?
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M8TJT · Posted: Tue Apr 05, 2011 11:33 pm Post subject:

No. No mapshare on my device. It's a bit funny if you take the first exit as well. It seems to recognise the 'outer' roundabout after you have left the 'inner' roundabout Confused

Border_Collie · Posted: Wed Apr 06, 2011 2:31 am Post subject:

Andy_P · Posted: Wed Apr 06, 2011 12:53 pm Post subject:

TT HQ have logged it as an issue for the mapping department to sort out.

cazian · Occasional Visitor Joined: Jun 06, 2006 Posts: 10

I don't know if it makes any difference, but there were very major changes in the layout of the Handy Cross roundabout, near High Wycombe - but probably about 5 years ago. Maybe this is a factor?

MrT · Posted: Wed Apr 06, 2011 6:18 pm Post subject:

Possibly the software cannot cope with a roundabout with a shortcut across it without turning it into a complex set of junctions instead?

I can remember approaching this junction Westbound on the M40 to turn South on the A404 towards Marlow and my TT took me onto the roundabout (saying keep right lane or similar) then wanted me to turn left across the inner most "slip lanes" which I should have taken in the first place. This was around Sept/Oct last year using whatever was the latest software and maps.
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Andy_P · Posted: Wed Apr 06, 2011 6:51 pm Post subject:

Mr-B · Posted: Wed Apr 06, 2011 10:10 pm Post subject:

Wow - tx for all the testing and info - and to confirm that it wasn't me seeing things! Wink

Mr-B · Posted: Wed Apr 06, 2011 10:49 pm Post subject:

I just found another example - try navigating a route from Leamington Spa, Binswood Street, (crossing @ A452 Clarendon Square) to Leamington Spa, Northumberland Road (crossing @ A452 Kenilworth Road).

This involves crossing a (small) roundabout with a shortcut to the first exit. TT says to turn left but the map route correctly shows taking the 2nd exit (straight on).

http://maps.google.co.uk/maps?f=d&source=s_d&saddr=Binswood+Street,+Leamington+Spa&daddr=Northumberland+Rd,+Leamington+Spa,+CV32,+UK&hl=en&geocode=FZn2HQMd3n_o_ymDEqb96DR3SDHWNH62hfITpw%3BFX4PHgMd5n_o_ykngzdg3TR3SDHi3nsV1uaALw&mra=ls&sll=52.295692,-1.540264&sspn=0.002566,0.004538&ie=UTF8&ll=52.296,-1.540146&spn=0.005131,0.009077&z=17

I checked another roundabout with a shortcut but that seems to be fine, so no idea if that aspect is relevant.

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