GOOG Stock: How does Google Maps know how long your journey will take?


For many people Google Maps has replaced the traditional sat nav as you can just open it up on your phone, attach it to a holder and away you go.

This is because Google Maps has done a lot of evolving over recent years, long gone are the days of having to download Google Earth just to get a satellite view of your favourite cities.

Now you can select your destination and Google will tell you how to get there and how long it will take.

But how exactly does Google know how long a journey will take?

Well it’s actually a combination of things, since 2011 Google has used its routing algorithms which has knowledge of current and historical traffic to select the fastest route and it will route you around traffic.

Accurate traffic speeds are calculated using data that Google collects from its Google Maps Navigation users and there is more than 35 million miles driven by Navigation users every day.

Google is able to do this because all iPhones that have Google Maps open and Android phones that have location services turned on send anonymous bits of data back to Google.


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