Airport Taxiway Markings and Signs Explained

5 October 2020, 08:50

Here we are with Episode 2: Taxiway. Hope you like, read and learn the Episode 1: Runway. Please do not forget to share with your friends for the continuation of the series.

Taxiways have centerline markings and runway holding position markings whenever they intersect a runway. Taxiway edge markings are present whenever there is a need to separate the taxiway from a pavement that is not intended for aircraft use or to delineate the edge of the taxiway. Taxiways may also have shoulder markings and holding position markings for Instrument Landing System (ILS) critical areas and taxiway/taxiway intersection markings.

Taxiway centerline markings

This is a single continuous yellow line. During the taxi, pilot should keep the aicraft center over this line. However, this situation does not guarantee wingtip clearance with other aircraft or objects.

Enhanced taxiway centerline markings 

This markings inform pilots about approaching a runway holding position marking. Also they consists of a parallel line of yellow dashes on either side of the normal taxiway centerline. 

Taxiway edge markings

As the understood from the title, these markings define the taxiway’s edge but that does not mean it is the same thing with edge of pavement. These markings typically consist of continuous double yellow lines unlike the dashed ones. Dashed lines are used when the adjoining pavement is intended to be used by aircraft (for example, an apron).

Taxiway shoulder markings 

These markings are yellow stripes which are forbidden to use by aircraft. Shoulder markings also present for taxiway curves. So pilots could understand which side of edge stripes is on their usage.

Surface painted taxiway direction signs 

These signs have a yellow background with a black inscription. Also they 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.

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.

Geographic position markings

These markings 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. 

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