UFC 3-535-01
17 November 2005
aforementioned items should all be moved away from the intersecting taxiway the
minimum necessary to resolve the conflict. If a conflict occurs between the center fixture
in the clearance bar and a centerline light, the center fixture may take the place of an
existing centerline light, and a new centerline light should be installed.
5-4.4
Location of a Clearance Bar Installed at a Taxiway Intersection
A clearance bar installed at a taxiway intersection is located in accordance with the
criteria in of paragraph 5-4.3 if that location is established as a hold point and
taxiway/taxiway holding position markings are present. Otherwise, the clearance bar
should be located in the same manner as if the holding position marking were present.
This allows room for the possible future installation of the marking.
5-4.4.1
Lateral Spacing
The center light of the clearance bar is installed in-line with existing or planned taxiway
centerline lights. The two remaining lights are installed outboard of the center fixture on
1.5 meter (5 foot) intervals, center-to-center. The outboard fixtures may be moved
laterally a maximum of 305 millimeters (1 foot) in order to avoid undesirable spot, i.e.,
conduit.
5-4.5
Light Beam Orientation for Clearance Bars
The axis of the light beam for each fixture should be parallel to the centerline of the
designated taxiway path with a tolerance of 1 degree.
5-4.6
Equipment
Use in-pavement fixtures with no part extending more than 0.01 meters (0.50 inches)
above the surrounding pavement. Hold lights must emit uni-directional aviation yellow
light toward the holding aircraft. When installed with taxiway centerline lights, the center
light must be bi-directional aviation yellow/green with the yellow light toward the holding
aircraft.
5-4.7
Photometric Requirements
Hold lights must emit aviation yellow light. All other photometric requirements in
paragraph 5-2.5 for straight section taxiway centerline lights apply.
5-4.8
Fixtures
Power and Control Requirements. The requirements for taxiway centerline lights apply.
Power and control the fixtures with the associated taxiway lighting system.
5-4.9
Monitoring
There is no requirement for monitoring.
5-4.10
Compliance with International Military Standards
ASCC and NATO Standards contain no comparable systems.
5-5
RUNWAY GUARD LIGHTS (RGLS)
5-5.1
Purpose
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