George Bush Tollway in Dallas (or as we call it here - the HYW to HLLL) went all electronic 2-3 years ago ! Our Tollway 49 in Tyler has never had manned (womanned) booths- all done with a "Texas Tag". Took my son to the airport in Houston 2 months ago and we took a Toll road- my Texas Tag worked on that too... seems smart and less expensive.
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David (OFI)