Not all states' transponders are yet compatible, although toll interoperability has been mandated by Congress. You may read more about this in our news section. This means you must make sure your toll pass is compatible with other states' tolling systems before you assume your transponder will be read in another state.

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E-ZPass States
The E-ZPass system is the largest interoperable toll collection and payment system in the United States, and it continues to expand, recently adding Kentucky's RiverLink to the list of states with compatible toll passes. Illinois' iPass is also connected to the E-ZPass system.
States connected to the E-ZPass system include Delaware, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, Virginia and West Virginia.
In Florida, drivers in the Metropolitan Orlando area, who use E-Pass, will soon find their passes compatible with E-ZPass. The Central Florida Expressway Authority announced November 9, 2017, they had entered into an interoperability agreement with E-ZPass. Compatibility is expected to begin in Spring 2018.
SunPass States
The Sun Pass is used primarily on state and local toll roads in Florida; however, it is compatible with Georgia's PeachPass system. It can also be used in North Carolina. It is also compatible with Orlando's E-Pass. Sun Pass is not compatible with E-ZPass.
E-Pass will be E-ZPass compatible in Spring 2018. That new E-ZPass compatibility will not extend to the Sun Pass transponder, however.
TxTag
TxTag is being integrated across the state of Texas, and it is nearly compatible with all local and state-operated toll roads.
FasTrak
FasTrak is California's statewide electronic toll system. Like TxTag, it is being integrated with all local and state-operated toll roads and bridges.
Other Passes
There are other toll systems in states that operate turnpikes or toll bridges and the like. For instance, Kentucky, which recently became part of the E-ZPass system, uses a system called River Link, for the Ohio River Bridges. In Oklahoma, which has eight regional turnpikes operated by the state, Pike Pass is well known to drivers. Georgia, which has express lanes on its freeways, uses a system called Peach Pass.
To find out about your state's pass, select the state of your choice in the menu.