"Millions of drivers have signed up in recent years for electronic devices that allow them to forgo cash at tollbooths. The system makes toll-paying fast and convenient, but also creates a rich database of your whereabouts down to the exact second. And soon it may follow you to more than a tollbooth. In the Northeast, the E-ZPass system, which has six million tags in circulation, is being tested at the drive-through windows at two McDonald's locations on Long Island, and the agency that oversees the system is studying whether to expand elsewhere, including gas stations and parking garages." It's the Cars, Not the Tires, That Squeal | 
