In the context of the National Airspace System, what are "skyways"?

The term "skyways" refers to routes specifically designed for organized traffic flows at certain altitudes within the National Airspace System (NAS). These routes help to manage air traffic efficiently by providing a structured framework for aircraft to follow, reducing the risk of collisions and optimizing the use of available airspace. By using skyways, air traffic controllers can more effectively sequence aircraft, ensuring smoother operations and enhancing safety.

Skyways facilitate the orderly movement of air traffic, especially in busy airspace, by delineating specific paths that aircraft should adhere to, typically at various altitudes. This structured approach allows for better coordination and communication among pilots and air traffic control, resulting in more predictable flight operations.

The other options reflect concepts that may relate to aviation but do not accurately describe skyways. Visual guidelines for aircraft navigation are generally associated with VFR (Visual Flight Rules) navigation rather than designated routes. Areas set aside for emergency landings pertain to specific locations rather than organized traffic routes. Lastly, flight corridors restricted to commercial planes only would not encompass the broader purpose of skyways, as they are designed for various types of aircraft to promote efficient traffic flow, not limited to commercial aviation.