What is TxTag, TollTag, EZ Tag?
All these are tag transponders that you can install in your vehicle to pay tolls electronically. You can purchase TxTag and it will be good for the whole of Texas at locations where TxTag is acceptable (There are bridges on Mexico Texas border that only accept cash. At all other places, you can use TxTag). Or, alternatively, you can use NTTA TollTag. The NTTA TollTag is accepted for toll payments in whole of Texas, Oklahoma & Kansas.