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Google Traffic is a feature on Google Maps which displays traffic conditions in real-time on major roads and highways in over 50 countries.〔(【引用サイトリンク】 publisher = Google )〕 Google Traffic can be viewed at the Google Maps website, or by using the Google Maps application on a handheld device. Google Traffic works by analyzing the GPS-determined locations transmitted to Google by a large number of mobile phone users. By calculating the speed of users along a length of road, Google is able to generate a live traffic map. Google processes the incoming raw data about mobile phone device locations, and then excludes anomalies such as a postal vehicle which makes frequent stops. When a threshold of users in a particular area is noted, the overlay along roads and highways on the Google map changes color.〔 ==History== Early versions of Google Maps provided information to users about how long it would take to travel a particular road in heavy traffic conditions. Traffic information was based on historical traffic data and was not particularly accurate. In 2004 Google acquired ZipDash, a company specializing on realtime traffic analysis. In 2007, Google integrated ZipDash's technology into Google Maps, offering traffic data, based on information gathered anonymously from cellular phone users. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Google Traffic」の詳細全文を読む スポンサード リンク
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