ED Decision 2022/006/R
(a) Runway incursions may take place in all visibility or weather conditions. The use of runway guard lights at runway-holding positions can form part of effective runway incursion prevention measures.
(b) Where taxiways are substantially wider than those specified in CS ADR-DSN.D.245, such as wide‑throat taxiways, the lights in Configuration A, located at each of the sides, are likely to be missed by pilots and may be necessary to be supplemented by a row of lights (inset) located across the taxiway, Configuration B.
(c) Higher light intensities may be required to maintain ground movement at a certain speed in low visibilities.
(d) The optimum flash rate is dependent on the rise and fall times of the lamps used. Runway guard lights, Configuration A, installed on 6.6 ampere series circuits have been found to look best when operated at 45 to 50 flashes per minute per lamp. Runway guard lights, Configuration B, installed on 6.6 ampere series circuits have been found to look best when operated at 30 to 32 flashes per minute per lamp.
(e) Where there is a need to enhance the contrast between the on- and off-state of runway guard lights, Configuration A, intended for use during the day, a visor of sufficient size to prevent sunlight from entering the lens without interfering with the function of the fixture should be located above each lamp. Some other device or design, e.g. special designed optics, may be used in lieu of the visor.
(f) Additional guidance on runway guard lights is given in ICAO Doc 9157, Aerodrome Design Manual, Part 4, Visual Aids.
[Issue: ADR-DSN/3]
[Issue: ADR-DSN/6]
Runway guard lights prevent incursions; Configuration A may need supplementing on wide taxiways. Flash rates vary by configuration. Visors enhance daytime contrast. ICAO Doc 9157 offers further guidance.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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