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There are a number of companies that offer RFID-based toll-collection systems. Among the largest are TransCore and Kapsch TrafficCom. Many toll-collection agencies use active RFID transponders to ensure 100 percent read reliability, though with recent improvements in passive UHF RFID technology, there has been a growing movement to use less expensive passive systems (see Efforts to Aid Adoption of ISO 18000-6C RFID for Toll Collection Move Forward). A wide variety of companies can provide the tags and readers required for a passive UHF RFID system. For a list of more companies that provide complete systems, see Which Companies Offer RFID Toll-collection Systems?.
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Who Makes RFID Tags That Can Operate at Very High Temperatures? »