Taxiway Markings Familiarization

GENERAL
All taxiway markings are colored yellow, have centerline markings, and runway holding position
markings whenever they intersect a runway. Taxiway edge markings are present whenever thereis a need to separate the taxiway from a pavement that is not intended for aircraft use or todelineate the edge of the taxiway. Taxiways may also have shoulder markings and holding
position markings for Instrument Landing System critical areas, and taxiway/ taxiway intersectionmarkings.

TAXIWAY CENTERLINE MARKING
The taxiway centerline is a single continuous yellow line that provides a visual cue to permit
taxiing along a designated path.

TAXIWAY EDGE MARKINGS
Taxiway edge markings are used to define the edge of the taxiway. They are primarily used when the taxiway edge does not correspond with the edge of the pavement. The markings are six inches wide, and set six inches apart from each other.

a. Continuous Markings These consist of a continuous double yellow line
that are used to define the taxiway edge from the shoulder or some other
abutting paved surface not intended for use by aircraft.

b. Dashed Markings These markings are used when there is an operational
need to define the edge of a taxiway or taxilane on a paved surface where
the adjoining pavement to the taxiway edge is intended for use by aircraft,
e.g., a hold pad or an apron. Each double dash marking is placed every
fifteen feet measures six inches wide by fifteen feet long, with a separation of six inches between
the double dashes.

TAXIWAY SHOULDER MARKINGS
Taxiways, holding pads, and aprons are sometimes provided with paved shoulders to prevent jet
blast and water erosion. Although shoulders may have the appearance of full strength pavement,
they are not intended for use by aircraft. Usually taxiway edge markings will define the area not
intended for use by aircraft. Where conditions exist such as islands or taxiway curves that may
cause confusion as to which side of the edge stripe is or use by aircraft, taxiway shoulder markings may be used to indicate that the pavement is unusable Taxiway shoulder markings are yellow.

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 it is 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.

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 the side of the taxiway and assist the pilot in confirming the designation of the taxiway where the aircraft is located. These markings are located on the right side of the centerline.

RUNWAY HOLDING POSITION MARKING
For runways these markings indicate where an aircraft is supposed to stop. They consist of four
yellow lines (two solid and two dashed), spaced six inches apart and extending across the width
of the taxiway or runway. The solid lines are always on the side where the aircraft is to hold. There are three (3) locations where runway holding position markings are encountered.
1. Runway holding position markings on taxiways that intersect runways.
2. Runway holding position markings on runways that intersect other runways when used for
Simultaneous Operations on Intersecting Runways (SOIR) or Land and Hold Short
Operations (LAHSO).
3. Taxiways located in runway approach areas.

SURFACE PAINTED HOLDING POSITION MARKINGS
Surface painted holding position marking supplement the signs located
at the holding position markings. This could be used where the width of
the holding position on the taxiway is greater than 200ft.

ILS CRITICAL AREA/Precision Obstacle Free Zone HOLDING POSITION PAVEMENT
MARKINGS
An area on a taxiway where during instrument conditions, an aircraft may interfere with the signals for the Instrument Landing System (ILS). Vehicles and Aircraft are
required, during instrument conditions, to remain behind the ILS Critical Area/Precision Obstacle Free Zone.