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dougconran
Regular Visitor
Joined: Oct 07, 2004
Posts: 175
Location: Bury St Edmunds, Suffolk
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 Posted: Sat Jan 14, 2006 12:55 am Post subject: Final turn instruction given too early |
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One of the (few) things that really frustrates me about the i3 (and probably all Garmins) is that the final turn instruction seems to be given at a random distance of between about 300 yards and 1 yard before the turning in question.
On the Tom Tom, when it says 'Turn left' it does so when you are about 10 yards from the turning. Because you have been pre-warned to turn some way back you are ready for it and away you go.
On the Garmin, on a number of occasions I've turned too early at which point, of course, the Garmin starts recalculating and we go through the whole process all over again. On one occasion I ended up going in ever decreasing circles.
If it was consistent in the distance before the turn I could live with it but it seems to vary with no obvious reason. It is not speed related because on some occasions, particularly when coming off a motorway, the final instruction is given about 1 yard before the turn off and yet other times when I'm doing about 30mph I seem to get the final warning about 20 minutes before the turn comes up (well, I'm exaggerating a bit, but not much  ). The end reult is that I'm never quite sure which road I should actually turn on to until I've turned and don't get a 'Recalculating...' ticking off.
I thought it might be related to whether there were other turnings before the required one but it doesn't seem to be that either (hence the reason I got lost earlier).
Has anyone worked out what is going on? |
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Skippy
Pocket GPS Verifier
Joined: 24/06/2003 00:22:12
Posts: 2946
Location: Escaped to the Antipodies! 36.83°S 174.75°E
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| Posted: Sat Jan 14, 2006 3:46 pm Post subject: Re: Final turn instruction given too early |
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| dougconran wrote: | | Has anyone worked out what is going on? |
I think the warning is based onthe road class rather than the speed you are travelling or the distance to the turn.
So, on a motorway you are warned at 1 mile then 400 yards whereas in town you would be warned at 300 yards and then 100 yards.
The reason you get a warning right on the motorway offramp is due to the way the maps are done. The off ramp is often quite long and the actual last safe place to leave the motorway may not be accurately marked on the map (too far away, thus you don't get much warning).
Quite often, the GPS will say 300 yards and people turn after 50 yards. What you have to do is stop when the GPS says (say) 300 yards/meters from your turn and get an idea of how far 300 yards actually is.
Also, keep an eye on the countdown to next turn. When in town, 50 yards or less means "right here". On the motorway, 200 yards or less means "right here".
It just takes practice. You'll get used to it. :D
_________________
Gone fishing! |
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irishgps
Occasional Visitor
Joined: Apr 05, 2005
Posts: 12
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| Posted: Mon Jan 16, 2006 4:28 am Post subject: |
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And also try playing around with the settings under vehicle type
This will decrease or increase the warning time based on "assumed" speed for each vehicle |
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