UFC 3-535-01
17 November 2005
9-4.2.2
Location signs may be FAA Size 1, 2 or 3. Size 3 signs are recommended
for Category I facilities and higher. Locate signs as indicated in paragraph 9-3.2.6.
9-4.2.3
A location sign may be grouped in a sign array. With mandatory signs, the
location sign should always be positioned outboard. With a direction sign array, the
location sign is placed so that all turns to the left would be located to the left of the
location sign, and all turns to the right or straight ahead would be located to the right of
the location sign. An exception is when only two taxiways intersect and the direction
sign indicates the crossing taxiway with arrows both ways, in which case the location
sign is positioned to the left.
9-4.2.4
Location signs are not always needed in conjunction with a direction sign.
The need is determined from evaluating the complexity of the intersection layout,
distance from the last location sign, complexity of prior intersections, traffic flow, and
typical conditions under which the intersection is used. Do not include a location sign as
an array with a destination sign or other information sign. See guidance in paragraph
9-5 for conventions on sign arrays. See FAA 150/5340-18 and associated SAMS for
further guidance on grouping several sign messages in an array.
9-4.3
Characteristics
See Chapter 13 and FAA 150/5345-44 for additional characteristic information.
9-4.3.1
Message
See paragraph 9-2.3.1.
9-4.3.2
Dimensions
See paragraph 9-2.3.2.
9-4.3.3
Electrical
See paragraph 9-2.3.3.
9-4.3.4
Photometrics
The average sign luminance, as determined in accordance with FAA AC 150/5345-44,
must be as follows for all intensity steps: yellow legend and border - 10 to 30 foot-
lamberts, with 16 to 30 foot-lamberts at the 2 highest intensity steps.
9-4.4
Power and Control
Runway location signs are connected to the runway edge lighting series circuit. Taxiway
location sign are typically connected to taxiway edge lighting circuits similar to taxiway
guidance and information signs in paragraph 9-3.
9-5
SIGNING CONVENTIONS FOR AIRFIELD SIGNS
9-5.1
There is no standard configuration for signing that applies to all airfields. In
laying out signing for an airfield, first conduct a thorough study of the runway and
taxiway layout drawings with local traffic controllers and the operational group using the
airfield. Signs are not necessarily needed at all potential locations on an airfield, and
judgment must be made based on standards, other guidance, and operational need in
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