What does the National Plan of Integrated Airport Systems (NPIAS) identify?

The National Plan of Integrated Airport Systems (NPIAS) plays a crucial role in identifying public use airports that are eligible for federal funding. This plan is vital for the strategic investment in and development of the nation's airport infrastructure. The NPIAS ensures that federal resources are allocated effectively to support airports that meet particular criteria—primarily those that serve the public and facilitate air travel, cargo transport, and other aviation-related activities.

By identifying eligible airports, the NPIAS aids in planning for modernization, expansion, and upkeep, ensuring that airports maintain safety standards and improve overall efficiency. This can include various improvement projects, from runway renovations to upgraded terminal facilities, which directly benefit local communities, travelers, and the national air transportation system.

The other options pertain to different aspects of aviation but do not capture the primary focus of the NPIAS. Commercial airline ticket prices, nonprofit aviation organizations, and private aviation service providers are important elements in the broader aviation landscape but are not the central concern of the NPIAS.