Which agency is responsible for setting standards in aviation in the U.S.?

The Federal Aviation Administration (FAA) is the agency responsible for establishing and enforcing regulations pertaining to civil aviation in the United States. This includes setting standards for airspace, aircraft operation, and air traffic control, as well as overseeing the certification of pilots and aircraft, ensuring safety in all areas of aviation.

The FAA plays a crucial role in maintaining the safety and efficiency of the National Airspace System. It develops and regulates policies that govern how aviation operates within the U.S., which is essential for the safe transportation of passengers and cargo. The agency also conducts research and promotes improvements in safety practices, contributing to ongoing advancements in technology and operations within the aviation industry.

The other agencies mentioned have different responsibilities; for instance, the Federal Rail Administration focuses on rail transport, the National Transportation Safety Board investigates transportation accidents across various modes, and the term "Aviation Safety Agency" does not correspond to a specific federal entity involved in aviation regulation in the U.S.