Which color light is used to indicate the edge of a taxiway?

• A. Red
• B. White
• C. Blue
• D. Yellow

Answer: (C)

The color blue is designated to indicate the edge of a taxiway. This specific light color is part of the standardized airport lighting system, which helps ground personnel and pilots navigate the airport environment safely. Blue lights are used on taxiways to delineate the boundaries and ensure that aircraft remain on the designated paths, preventing them from straying onto runways or into other restricted areas.

In contrast, other colors serve different purposes within the airport lighting system. For instance, red lights indicate the edges of runways or are used as stop indications, while white lights are commonly used for runway lighting and approach lights. Yellow lights may be used for taxiway centerlines or various signs, but they do not represent the edges of taxiways.