Question

How does google detect traffic congestion?

Answer 1

Google Detect Traffic is a feature on Google Maps that displays traffic conditions in real time on major roads and highways. Google Traffic can be viewed at the Google Maps website, or by using the Google [1 ]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.[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.