TRB’s Airport Cooperative Research Program (ACRP) Synthesis 75: Airport Advisories at Non-Towered Airports documents the manner in which non-towered airports provide advisories to pilots regarding winds, traffic, and runways in use. Unlike with pilot advisories, there is little guidance available for airport operators in providing airport advisories. The objective of this report is to aggregate available guidance on this topic and document information from non-towered airports with at least 50,000 annual aircraft operations. The report includes a literature review and a telephone interview survey of 165 non-towered airports. Six case examples are included, documenting effective airport advisory programs in place at airports.