FAA Ground School Practice Test

How are airport taxiway edge lights identified at night?

1. Red lights

2. White lights

3. Amber lights

4. Blue omnidirectional lights

The correct answer is: Blue omnidirectional lights

Taxiway edge lights are used to delineate the edges of taxiways during nighttime or low visibility conditions. They are specifically designed to be easily distinguishable from other types of lights on the airfield. The correct identification for taxiway edge lights is that they are blue omnidirectional lights. These lights serve an important purpose by guiding pilots during taxi operations, highlighting the edges of taxiways and helping to prevent them from inadvertently straying onto the runway or off the designated path. The use of blue lights is standardized, ensuring consistency and safety across airports. In contrast, other colors have different meanings in aviation lighting. For example, red lights generally indicate the boundaries of a runway, while white lights are used for runway centerlines. Amber lights may be used in certain situations, such as cautionary lighting for temporary obstacles or in construction zones.