其實 Google Map 點樣知道塞車？

$foo

咁多人開左 Google Map?

ivan1612

好似係後台 自動

DeathSon

靠大家部電話

via HKEPC Reader for Android

Eric321

聽聞係結合左(1)由用家匿名傳送俾Google嘅即時數據同埋(2)統計紀錄
以Android使用人數計算, 要收集數據統計出某個路段某個時間交通流通量唔難
而且宜家好多人會開Google Map檢查即時路面情況, 所以個Apps就可以越黎越準

pure_water

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.[2] Google processes the incoming raw data about mobile phone device locations, and then excludes anomalies such as a postal vehicle that 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

https://en.wikipedia.org/wiki/Google_Traffic