UFC 3-535-01
17 November 2005
CHAPTER 5: STANDARDS FOR TAXIWAY LIGHTING
5-1
TAXIWAY EDGE LIGHTING
5-1.1
Purpose
Taxiway edge lights define the lateral limits and direction of a taxiing route. Taxiway
edge lighting must be installed for night VMC operations and for day and night
instrument operations.
5-1.2
Configuration
The configuration consists of a line of lights paralleling each side of the taxiway. Provide
taxiway lighting for all regularly-used taxiing routes. Locate the line of taxiway edge
lights on each side of the taxiway no more than 3 meters (10 feet) from the edge of the
full-strength paving, and no closer than the edge of the full-strength paving. The line of
lights on both sides of a taxiway must be the same distance from their respective
taxiway sides. When a runway or a portion of a runway is part of a regularly used taxiing
route, provide taxiway lights in addition to the runway lights. To determine the spacing
of lights along the taxiway length, such as intersections with runways and other taxiways
or changes in alignment or width, a discontinuity on one side of a taxiway applies to the
other side as well; Figure 5-1 illustrates most situations. Place an edge light at each
discontinuity. For intersecting pavements, place them at the point of tangency (PT) of
each fillet. Place a companion light on the side opposite the discontinuity as well.
5-1.2.1
Straight Sections
Place edge lights along all straight taxiway edges at uniform intervals between the
lights, as in paragraph 5-1.2. Where the length of the section is greater than 120 meters
(400 feet), the spacing must not exceed 60 meters (200 feet). If the section under
consideration is opposite an intersecting taxiway or apron area, the uniform spacing
must not exceed 1/2 the width of the intersecting taxiway. Where the length of the
section is less than 120 meters (400 feet) the spacing must not exceed 30 meters (100
feet). Where the light spacing exceeds 30 meters (100 feet), place one additional light
12 meters (40 feet) from each end of the section. Where the section is opposite an
ending taxiway, the uniform spacing must not exceed 1/2 the width of the ending
taxiway. Place companion lights along the opposite edge where there is no intersecting
pavement. Place all companion lights on lines perpendicular to the taxiway centerline.
(See Figure 5-1.)
5-1.2.2
Curved Sections
Place edge lights along all curved taxiway sections. Uniformly space the lights on the
outer line at a distance, not to exceed the value obtained from the formula given in
Figure 5-2. Place the lights on the inner line on radials from the outer line of lights,
except where the resultant spacing would be less than 6 meters (20 feet). In this case,
select spacing not less than 6 meters (20 feet) for the inner line of lights and place the
outer line of lights on radials from the inner line.
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