Topic summary
TollTag

Extracted from the Wikipedia article North Texas Tollway Authority.
TollTag
TollTag is the electronic toll collection system used by the NTTA in the Dallas / Fort Worth metro area. It was the first electronic toll collection system in the United States when it was installed on the Dallas North Tollway in 1989. There are currently over 4 million TollTags in operation in the North Texas area. The NTTA offers reduced toll rates for TollTag users at all toll points.