The Public Transportation (PT) information Sharing & Analysis Centers (ISACs) worked with the American Public Transportation Association (APTA), the Association of American Railroads (AAR), and the Transportation Security Administration (TSA) to create the Transit and Rail Intelligence Awareness Daily Report (TRIAD) and associated library. To promote improved awareness, the TRIAD provides a carefully curated list of articles, reports, and original ISAC analyst commentaries on suspicious activity and incidents, counterterrorism, physical security, safety, and cybersecurity.
