[JD159]

So how does Google know what traffic is like on the roads, nearly all the time? From our smartphones, of course. Whether you like it or not, “telephone companies have always known where your phone is,” Dobson says, because cell phone companies need to use location to appropriately charge customers for calls. That means the companies are constantly monitoring location based on the strength of signal to a cell tower, which allows the phone to switch towers as it travels. Since 2011, the Federal Communications Commission has also required that phones come with GPS, so between the triangulation with cell towers and the GPS requirement, your phone is a marked man.

Sorry gacook. They still know where you are!