The Washington Post’s Dr. Gridlock explains that transponders do wear out and motorists need to keep their account records up to date to avoid penalties for unpaid tolls. He notes that as AET continues to grow, “the gantry provides no feedback to the driver about the state of the transponder. I’ve heard from drivers who want that, but I haven’t seen a safe way to provide the feedback without distracting drivers while they travel at highway speeds.”
