How are taxiway centerline lights typically configured?

Taxiway centerline lights are configured as bidirectional steady burning lights. This design allows for effective visibility and guidance for pilots during taxi operations both day and night. The bidirectional aspect means that lights can be seen from both directions along the taxiway, assisting pilots regardless of which direction they are taxiing. The steady burning feature provides consistent and reliable illumination, helping to define the center of the taxiway and guiding aircraft safely between the taxiway edges.

In contrast, other configurations such as flashing red lights are used for different purposes, such as indicating an immediate need to stop or caution, which would not be appropriate for a taxiway centerline where consistent guidance is needed. Multicolored lights are also typically used for specific signaling but not for standard taxiway centerline guidance. Non-illuminated markings would lack the necessary visibility required for safe maneuvering on the taxiway, especially in low light conditions. Thus, the bidirectional steady burning lights configuration is the most effective and widely adopted design for taxiway centerline lighting.