Patent ID: 8205796

Claim:
A transit system for processing exposure to an item of interest, the transit system comprising: a plurality of detectors sensitive to the item of interest, wherein: the item of interest is one of a chemical, a biologic compound, radiation, or an explosive, and the plurality of detectors produce detection information indicative of the item of interest; a reader that uses at least one of a radio frequency identification (RFID), optical, or magnetic interface to read card information associated with a fare media; an analysis subsystem that: determines a threat assessment value for an event based, at least in part, on a purchase of the fare media, including at least one of: a purchased fare product type, a ticket type, or a purchase methodology; wherein an identity of a user of the fare media is unknown; and communicates the threat assessment value to a station device; the station device that uses the threat assessment value and one or more of the card information or the detection information to determine if an action should be allowed when the event has occurred; and a portal that performs the action when the event has occurred, wherein the portal includes at least one of: a fare gate, a validator, or a fare box.