Скачать или смотреть How live traffic updates work in Google maps?? Explain in Hindi

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 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.
Cellular telephone companies constantly monitor the locations of user devices. One tracking method is trilateration, whereby the distance (time delay) to three or more surrounding cell phone towers is measured. Another tracking method monitors the exact user coordinates determined by a GPS receiver inside the phone. GPS-equipped cellphones began appearing in 2004,and by 2011, the U.S. Federal Communications Commission required that all new cellular phones be able to pinpoint location to within 50 feet.

Soliciting electronic information from a large group of people this way is referred to as crowd-sourcing.
Google stated: "When we combine your speed with the speed of other phones on the road, across thousands of phones moving around a city at any given time, we can get a pretty good picture of live traffic conditions".