Proposals for updates of the US rail and transit fire standard NFPA 130 is under discussion. Proposed modifications include elimination of “limited combustible materials” from all construction. This will require extensive station reconstruction if adopted, to replace such materials with non combustible materials such as concrete or steel. Other proposed changes include adding melting and dripping requirements for generic flame spread and for upholstery, interior finish fire testing to NFPA 286 (that is: room corner test, not just ASTM E84 Steiner tunnel test) and clarifications for testing of cables, trays, adhesives and sealants.
NFPA 130 “Standard for Fixed Guideway Transit and Passenger Rail Systems” https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=130