In what scenario is a "traffic alert" issued by ATC?

A "traffic alert" is issued by ATC when two aircraft are in close proximity to each other, indicating a potential conflict or risk of midair collision. This alert serves to provide pilots with immediate awareness of another aircraft's location, allowing them to take necessary action to ensure safety.

In situations where multiple aircraft are operating in the same airspace, it becomes crucial for controllers to monitor the distances between them. The traffic alert is a proactive safety measure aimed at preventing accidents by prompting pilots to increase their vigilance and perform maneuvers, like altitude changes or course adjustments, if necessary.

The scenario of an aircraft approaching the runway does not specifically trigger a traffic alert, as this is generally managed through standard sequencing and traffic management. Similarly, while delays and sudden changes in weather impact operations, they do not directly relate to the issuance of traffic alerts, which are focused solely on maintaining safe separations between airborne aircraft.