Which Traffic Management Initiative involves keeping aircraft 1 mile apart?

The initiative that involves maintaining a separation of one mile between aircraft is known as Mile-in-trail restrictions. This traffic management strategy is designed to ensure safe spacing between aircraft in the airspace, particularly during periods of high traffic volume or when there are specific operational concerns, such as adverse weather conditions or runway capacity limitations. By requiring aircraft to maintain this distance, controllers can effectively manage the flow of air traffic, reduce the risk of incidents, and enhance overall safety.

Other traffic management initiatives, like Ground delay, Sequencing, and Ground stops, serve different purposes. Ground delays are used to hold aircraft on the ground to prevent congestion in the airspace, Sequencing refers to the process of arranging aircraft in an orderly manner for takeoff or landing, and Ground stops are enforced to halt all departures for certain flights until conditions improve. Each of these methods has its own specific use case but does not specifically dictate the one-mile spacing requirement that is characteristic of Mile-in-trail restrictions.