TxTag can be used on certain out-of-state toll roads, particularly in neighboring states like Oklahoma and Kansas, as it is compatible with their electronic toll collection systems. However, it is important to note that this compatibility may vary by state and specific toll road operator. Some states may use different systems, which can lead to issues when using a TxTag. Therefore, it is advisable for individuals to check the specific toll road policies in the state they plan to visit. The TxTag website includes a list of participating roadways that accept TxTag, making it easy for users to verify which roads are compatible. Additionally, drivers should be aware that using a TxTag on non-participating toll roads might result in fines or penalties. For the most accurate and up-to-date information regarding out-of-state use, visiting the TxTag website would be very helpful.