I can't help with the Nuvi--I have one, but I used it for a few days
before I decided Google Maps on my phone was infinitely better.
Like John says, there's a 'traffic' layer. I resolutely ignored it for
at least a year, not trusting it, until it tried to route me off an
interstate once and I ignored it (stupid computer). I spent four hours
at a dead stop on the interstate while a co-worker who followed its
instructions (he didn't know there was an interstate there...really) had
almost no delay. I follow its advice on routing now, or at least check
the traffic 'layer'.
Other than that, I do like Phil said and just use it as a map. I do that
for the very same reason mentioned in the original post--I was trying to
go through Nashville once and it took me through the city on the
interstate when I wanted to go around. I couldn't ever figure out how to
make it do that, and I didn't see an 'avoid cities' option, so I just
use Google Maps on my phone like I'd have used a paper map years ago.
Except with traffic congestion noted. Nashville and...I'm trying to
remember the other city--Richmond, maybe?--are particularly awful for
that. I want to just go around them, Google wants me to drive through them.
On 12/12/2012 2:15 PM, John Miller wrote:
> GPS signals alone will not help you with traffic congestion.
>
> Google Maps on my HTC (Android) has 'layers' that will permit you to
> add traffic color-coding, gas-station locations, etc. to the map
> display. It's proven fairly accurate in my experience.
>
> This of course relies on a data connection, not just GPS satellites.
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