11/30/2023 0 Comments Airport runway lights at nightAt some airports where a Stop Bar is located on or close to a bend in a taxiway, additional elevated red lights may be positioned just beyond each edge of the taxiway so as to improve awareness of the Stop Bar location. Where installed, they are positioned before all taxiway/runway intersections (see Runway Status Lights (RWSL)) and may also be provided at other appropriate points within the taxiway system. These are provided at LVP airports and consist of a row of lights spaced evenly across the taxiway normally at right angles to the centreline and showing red towards an approaching aircraft when lit. Unless lighting is selectable (see below) then where any part of a taxiway equipped with centreline lighting is within a designated ILS-sensitive area (or is so close to a runway as to constitute an obstruction for aircraft landing or taking off from that runway) then that part of the centerline lighting will be marked with alternating green and yellow lights and aircraft and vehicles should not stop in such areas without obtaining explicit ATC approval. The edge of aprons, turning and holding areas are usually marked by blue lights.Īirports which operate at night but not in low visibility will have either green centerline or blue edge lighting or a combination of the two at the discretion of the Airport Operator. Lead-on guidance from designated runway holding points onto runway centerlines may also be provided but if it is, it will be illuminated only if a specific clearance to enter that runway from that position is current. It should be noted that green taxiway centreline lighting may also be installed on a runway just prior to a designated exit taxiway in order to give lead-off guidance. Where green centreline lighting is provided, blue taxiway edge lighting may also be provided as additional guidance on sections of taxiway that are assessed as potentially difficult to negotiate. Centreline and Edge LightingĪirports operating in low visibility have green centreline lighting on principal taxiways and blue edge lighting on minor taxiways. Low intensity lighting is provided where operations are carried out at night but not in low visibility conditions and the luminance intensity is normally not adjustable. Lower intensities are suitable for night operations. The performance specification for high intensity lighting is defined by the need to provide guidance by day in low visibility conditions the highest intensity settings are normally used in these conditions. The intensity options are usually set up by the ANSP, which will have operational control of the lighting system the settings can be varied upon request by the user. Lighting provided in support of low visibility operations can normally have the degree of luminance remotely selected to suit environmental conditions. Taxiway lighting is designated as either high intensity or low intensity. Lighting embedded in the useable surface of a taxiway or marking the edge of available movement areas can be expected to follow the international standards specified in ICAO SARPs unless information to the contrary is published for a particular airport in a State AIP. The purpose of taxiway lighting is to help ensure that both flight crew and vehicle drivers follow the correct taxiway routings at night and in low visibility and correctly stop as their ATC clearance limits.
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