UFC 3-535-01
17 November 2005
operations. They are also used instead of edge lights on taxiway sections that cross
aprons, ramps, or other large paved areas.
5-2.2
Configuration
Install taxiway centerline lights in smooth lines along the taxiway centerline. To avoid
construction joints or markings, the line of lights may be offset uniformly a maximum of
0.6 meters (2 feet) from the centerline. Determine the light spacing as follows:
5-2.2.1
Place a light at each holding position, at each PT of a curved section, at
each taxiway end, at each intersection with a runway edge or apron, and at the PTs of
all fillets. Where taxiways cross, place a light at the intersection of the centerlines.
5-2.2.2
Place uniformly spaced lights between the points defined above, along all
straight and curved sections of the taxiway. The uniform spacing will approach, but not
exceed, the criteria given in Figure 5-5. The location of individual lights may be adjusted
along the line of lights a maximum of 0.6 meters (2 feet) to avoid construction problems.
5-2.2.3
At taxiway intersections, place lights along an arc drawn tangent to the
centerlines of the taxiways (or lines of lights) in the direction of all aircraft turns. In order
to reduce confusion where aircraft turns are not anticipated, the arc of lights may be
omitted. The minimum clearance to the inner edge of either taxiway must be equal to
one half the width of the narrower taxiway. Select the largest radius that will provide the
clearance for the arc of lights. Do not install taxiway centerline lights on runway
surfaces, except as specified for runway exit lights.
5-2.3
Tolerances
Taxiway centerline lights must not be more than 0.07 meters (3 inches) off of the
designated line of lights and not more than 0.15 meters (6 inches) from the designated
locations along the line of lights.
5-2.4
Equipment
See paragraph 13-11.2. Use in-pavement fixtures which do not protrude more than 0.01
meters (0.50 inch) above the pavement. They must be bi-directional aviation green
except as follows:
5-2.4.1
At crossing taxiways, the light at the intersection must be omni-directional
aviation yellow.
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