How are the edges of a taxiway indicated?

The edges of a taxiway are indicated by two parallel solid yellow lines. This marking serves multiple purposes; primarily, it helps to define the taxiway boundaries for pilots, ensuring that they remain on the designated paths while taxiing. The solid yellow lines are easily visible from the cockpit and provide clarity in low visibility conditions, facilitating safe ground operations.

In contrast, other markings serve different purposes. For instance, a single solid green line is typically used for the edges of runways, not taxiways, while two parallel dashed yellow lines are often used to indicate a path that may be crossed or to delineate temporary markings, rather than the definitive edges of a taxiway. A single dashed red line is used to indicate a hold short line at a runway threshold, further differentiating it from taxiway edges. Understanding these markings is essential for pilots to navigate the airport environment safely and effectively.