Driving Data Reveals Routes

How driving data can reveal routes.  This has been long known, and has been used in a number of contexts.  A good example of analytical method based on sensor data.  A Podcast.  In the Sciam:  " ... Insurance companies have for years offered a compelling tradeoff to their customers: they track your driving habits, you save up to 30 percent off your bill for driving safely. But researchers now say that consumers may be giving up too much privacy in the deal. ... "