Final answer:
The segmented circle at an airport indicates the traffic pattern direction, typically left-hand traffic unless noted otherwise, which is Option 1: Left-hand traffic.
Step-by-step explanation:
The segmented circle at an airport is a visual aid that helps pilots understand the airport traffic patterns, particularly which direction to turn after takeoff or when approaching to land. The pattern could be either left-hand traffic or right-hand traffic. When a segmented circle is present, pilots can determine the airport traffic pattern by observing the small segments that depict the direction of the turns that are expected when flying the traffic pattern for a particular runway. In aviation, traffic patterns are typically to the left, so unless indicated otherwise by the segmented circle or airport signage, the default pattern is left-hand traffic. Hence, the correct answer to the question is Option 1: Left-hand traffic.