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Old 12-27-2012, 12:54 PM   #43
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Thank you everyone. We have now purchased a McNally gps.

Thanks for all your help!

Andrew
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Old 12-27-2012, 02:51 PM   #44
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The real time traffic does not require an internet connection.
That's interesting. How does it get real time information without an internet connection????

Rick
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Old 12-27-2012, 03:53 PM   #45
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good question - how does that work???
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Old 12-27-2012, 03:55 PM   #46
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That's interesting. How does it get real time information without an internet connection????

Rick
Live Traffic
To incorporate data about ever-changing traffic and road conditions, however, GPS units must be able to receive live information over the air. One way to do this is by radio transmissions over frequencies that are close to the frequencies used by your car stereo. By using "sidebands" or the Radio Data Service (RDS), providers such as MSN Direct and Navteq send digitized traffic (and often weather and news) information to equipped GPS units from local radio transmitters.

Cars with built-in Sirius/XM satellite radio and GPS systems can also receive live traffic information in the background over the satellite radio signal. This information will be automatically incorporated into the GPS system's route.

These services usually require a subscription. The above systems are also "one-way:" while the mobile GPS unit receives data from the traffic information source, it doesn't communicate any information back.

Source: How Does Live Traffic on GPS Work? | eHow.com
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Old 12-27-2012, 04:42 PM   #47
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Very cool. Thanks for the explanation.

Rick
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Old 12-27-2012, 04:50 PM   #48
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Very cool. Thanks for the explanation.

Rick
BTW, I bought the Real-Time Traffic receiver for my 7710. Have not seen the benefit yet. Not that it doesn't work, I just haven't hit any major traffic issues to take advantage of the system and reroute based on the information.

Going to move it to my NEW 7720 . Hope I don't need it.
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Old 12-28-2012, 06:50 AM   #49
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BTW, I bought the Real-Time Traffic receiver for my 7710. Have not seen the benefit yet. Not that it doesn't work, I just haven't hit any major traffic issues to take advantage of the system and reroute based on the information.

Going to move it to my NEW 7720 . Hope I don't need it.
You just haven't spent enough time in the Northeast or Southern Florida!
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