RICHMOND, VA - A year and a half after an audit found wide spread abuse of gas cards meant for the City of Richmond's fleet, the city is taking steps to stop it, according to the Web site,

Instead of cards, they're installing black rings in the car's gas tanks.  When someone goes to fill them up, the ring in the car meshes with a ring on the gas pump and sends the vehicle information to a computer.  The computer then registers the time and location of the transaction, as well as the car's mileage and the amount of fuel pumped.

Without the ring, the pump won't dispense fuel.  And the system is nearly tamper proof. If the computer determines that the car hasn't been driven enough miles to account for the amount of fuel being pumped, it will send a warning to city officials, according to