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AIM

10/12/17

2−3−10

Airport Marking Aids and Signs

FIG 2−3−8

Enhanced Taxiway Centerline

FIG 2−3−9

Dashed Markings

DOUBLE
YELLOW
LINES

TAXIWAY EDGE
MARKINGS
CONTINUOUS

TAXIWAY EDGE
MARKINGS
DASHED

e. Surface Painted Taxiway Direction

Signs. Surface painted taxiway direction signs have

a yellow background with a black inscription, and are

provided when it is not possible to provide taxiway

direction signs at intersections, or when necessary to

supplement such signs. These markings are located

adjacent to the centerline with signs indicating turns

to the left being on the left side of the taxiway

centerline, and signs indicating turns to the right

being on the right side of the centerline. (See

FIG 2−3−11.)

FIG 2−3−10

Taxi Shoulder Markings

YELLOW STRIPES

PAVEMENT EDGE

TAXIWAY EDGE
MARKINGS

RUNWAY

f. Surface Painted Location Signs. Surface

painted location signs have a black background with

a yellow inscription. When necessary, these markings

are used to supplement location signs located along

side the taxiway and assist the pilot in confirming the

designation of the taxiway on which the aircraft is

located. These markings are located on the right side

of the centerline. (See FIG 2−3−11.)

g. Geographic Position Markings. These mark-

ings are located at points along low visibility taxi

routes designated in the airport’s Surface Movement

Guidance Control System (SMGCS) plan. They are

used to identify the location of taxiing aircraft during

low visibility operations. Low visibility operations

are those that occur when the runway visible

range (RVR) is below 1200 feet (360m). They are

positioned to the left of the taxiway centerline in the

direction of taxiing. (See FIG 2−3−12.) The

geographic position marking is a circle comprised of

an outer black ring contiguous to a white ring with a

pink circle in the middle. When installed on asphalt

or other dark-colored pavements, the white ring and

the black ring are reversed (i.e., the white ring

becomes the outer ring and the black ring becomes the

inner ring). It is designated with either a number or a

number and letter. The number corresponds to the

consecutive position of the marking on the route.