KarTrak

KarTrak, sometimes KarTrak ACI (Automatic Car Identification) or just ACI was a colored barcode system designed to automatically identify railcars and other rolling stock. KarTrak was made a requirement in North America in 1967, but technical problems led to the abandonment of the system in the late 1970s.

This article is about the obsolete barcode railcar identification system. It is not to be confused with the current RFID system, Automatic equipment identification.
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