The primary reason that an E-ZPass device would fail is incorrect installation. Please make sure your transponder is installed according to the instructions provided. The second most common reason for transponders to fail is due to account status causing your device to be invalid. In either case, it takes up to 24-48 hours for the status of your transponder to reach every toll road, so a valid account at a home agency does not necessarily mean it is valid in all other toll roads at the same time.

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