Taxiway lighting is utilized to guide the aircraft to the runway from the apron and from the runway to the apron by illuminating the edge of taxiways in nighttime and low-visibility conditions. It is part of the aeronautical ground lighting (AGL) that provides the pilot of an aircraft with clear and consistent guidance on location, orientation and alignment in adverse visibility conditions and at night.
Taxiway lighting must be identified on the runway during the rollout of the aircraft from a distance that assists the pilot in transitioning from the runway to the taxiway. It must then guide the pilot through curves and intersections with other taxiways and runways and allows the pilot to steer the aircraft safely to the apron while avoiding leaving the pavement or colliding with building, structure or other aircraft in the maneuvering area.
Taxiway lighting is provided by taxiway centerline lights, taxiway edge lights, runway guard lights (RGL), runway stop bars and clearance bars.