Google Maps Mobile Users Send Traffic Data
If you use the mobile Google Maps application on a phone that has GPS, you're sending Google real-time traffic information. "When you choose to enable Google Maps with My Location, your phone sends anonymous bits of data back to Google describing how fast you're moving. 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," explains Google.
