The Taxiway Takeoff Alert is issued when the aircraft attempts to takeoff from a non-runway (e.g., a taxiway). The system determines this when the takeoff phase-of-flight is valid, the thrust levers are advanced, and the aircraft is not aligned with the runway.

In addition to the visual and voice alert, the Information Box contains a textual description of the currently occupied taxiway (or other maneuvering area) and potentially the next area (apron or maneuvering area) to be occupied (based on aircraft heading and the airport geometry) and the distance to that area.