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      03-16-2013, 05:05 AM   #8
sfax
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Drives: BMW X3 2011 F25
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Quote:
Originally Posted by 5mph View Post
Anyone know what the configuration speeds the SatNav uses?
The journey times it produces are nonsense, 25% to 50% too much.
The problem seems to be that it is set for about 15mph for all roads other than Motorways and Trunk roads which seem to be 70mph and 45mph.
Can it be changed?

Thanks
I've always found it very accurate (within 5% generally) but i think this may be related to the latest RTTI software which factors in more information and probably messes it up.

The vectors for all of the roads in the UK are widely available and I think it's only when the software starts adjusting them that you get inaccuracies (hence me blaming RTTI which I don't have on mine)
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