From the North Texas Tollway Authority (NTTA)
Residents can open a new NTTA TollTag account at the Utility Billing Department in Colleyville City Hall. Drivers using a TollTag will pay less to drive NTTA roads than those who do not have an account. You can use your NTTA TollTag on any toll road in Texas. You may also use it for pass-through and “terminal” parking at DFW International Airport, and for parking at Love Field Airport in Dallas. Watch for the orange circle “T” at several downtown parking locations.