It's EZ pass. You don't need a tin-foil hat on to see all the damn RFID readers going up on side of the highways.
I wouldn't have one. My son is fighting with the City of Houston now over his EZ Pass. He was paying his with a deduction from a credit card. Forgot about it and had canceled the credit card. No notification from them or anything. They let him ride the beltway for over a year, then came after him for unpaid tolls and thousands of $ worth of late fees. He's been driving the back roads to work and avoiding the toll roads since then.