bfwebster writes "Here in Denver, we have E-470, a toll section of the 470 beltway, that uses the usual transponder attached to your windshield. Fair enough, and I make use of it, particularly in driving to the airport. But they've just implemented new technology on E-470 that allows anyone to drive through the automated toll gates. If you don't have a transponder, it takes a photo of your license plate and sends a monthly bill to your house. As a result, the company that runs E-470 plans to close all human-staffed toll booths by mid-summer. And as an article in this morning's Rocky Mountain News notes, 'Such a system could be deployed on other roads, including some that motorists now use free. The result: a new source of money for highways and bridges badly in need of repair.' You can bet that legislators, mayors, and city councilpersons everywhere will see this as an even-better source of income than red-light cameras. You've been warned."