Final answer:
The taxiway directional sign at an intersection helps indicate the correct path for pilots by showing the designation and direction of the taxiway leading out of the intersection.
Step-by-step explanation:
When turning onto a taxiway from another taxiway, the purpose of the taxiway directional sign is to indicate the designation and direction of the taxiway leading out of an intersection. These signs are crucial for pilot navigation on the ground to prevent confusion and ensure smooth and safe movements within the airport environment. The signs usually consist of a black background with yellow letters and an arrow indicating the direction to follow for a particular taxiway or to a specific destination, such as a runway or another notable airport area.