Question:

How does my GPS calculate the time to reach a place?

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Does it factor is posted speed limits? How does it factor in for traffic?

how do websites like yahoo maps and google maps do it?

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  1. It basically knows the hwy speed limit and assumes that.

    But as you drive, it uses your real speed to recalculate the distance / speed = time.

    Google man and Yahoo map just used hwy speed limits only.

    ===

    Recently TomTom came out with REAL traffic data to calculate the estimated time of arrival.

    Good Luck...


  2. they dont they just go off by the kms and x it by the speed limits in each one of the areas. it dose not include trafic so if it says 20mins that is a clear run not peak hour trafic. good luck hope this helped
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