Which marking indicates taxiway edges?

The marking that indicates taxiway edges is represented by two solid yellow lines. These lines are critical for aviation safety as they visually delineate the boundary of the taxiway, ensuring that pilots and ground vehicles remain within the designated path while moving around the airfield. The use of two solid yellow lines signifies that there is a clear and definable edge to the taxiway, which is important for effective navigation and to prevent accidents.

In contrast, a single dashed yellow line typically indicates that a vehicle may cross the line if necessary but implies some caution, creating a less defined boundary compared to the two solid lines. A dashed white line is generally used for runway, not taxiway markings. Lastly, a solid red line is commonly employed to indicate a boundary of areas where vehicles are restricted, such as on the ramp or near active runways. Understanding these markings is vital for maintaining safety and operational efficiency on the airfield.