TxTag/ˈtɛkstæɡ/,[1] operated by theTexas Department of Transportation (TxDOT), was one of threeinteroperableelectronic toll collection systems inTexas. The system was also interoperable with theK-TAG system used inKansas and thePikepass system used inOklahoma.
On Nov 9, 2024, it was announced that theHarris County Toll Road Authority (the operators ofEZ TAG) would be taking over TxTag.[2]
The TxTag brand name is used on the following highways:
In 2003, allGreater Houston area toll-roads operated byHarris County Toll Road Authority andFort Bend County Toll Road Authority (EZ TAG), and allDallas–Fort Worth metroplex area toll-roads operated byNorth Texas Tollway Authority (TollTag) became compatible with TxTag, with the exception ofDallas/Fort Worth International Airport andDallas Love Field airport parking, where NTTA's TollTag is the only ETC system recognized.
On May 17, 2017, theKansas Turnpike Authority made TxTag compatible with theK-TAG system used on theKansas Turnpike.[3]
On May 7, 2019, theOklahoma Turnpike Authority made TxTag compatible with thePikePass system used on all ofOklahoma's turnpikes.
On June 2, 2024, Colorado made TxTag compatible with the ExpressToll system used on CDOT's express lanes and the E-470 toll road, but not on the Northwest Parkway.
NationalPass provides interoperability with systems outside Texas.
TxTag transponders are currently not accepted at tolled border crossings with Mexico, although future interoperability is planned with theLaredo Trade Tag accepted atfour crossings. TxTag is not compatible with transponders from theE-ZPass system, although the two systems have been in talks with each other.[4]
TxTag uses at least two types of transponders manufactured byTransCore: legacy hard case AT5100 transponders and newer eGo Plus flexible sticker-type transponders. The transponders are mounted on the inside of the vehicle at the top center of the windshield. The TxTag sticker can be used as a portable device, provided it is affixed to a small square of glass instead of a windshield. According to the patent for the device[citation needed], the sticker was specifically designed such that if removed, among other things capacitor 66 is decoupled from 64, preventing the use of the sticker if it is torn from the glass. It would also appear the sticker can be simply taped to the inside of the windshield for temporary use.