However, being centered on the taxiway centerline does not guarantee wingtip clearance with other aircraft or objects. Ideally, the aircraft should be kept centered over this line during taxi. Normal taxiway centerline markings are a single continuous yellow line. These markings consist of two parallel, yellow-dashed lines located on either side of the normal taxiway centerline beginning approximately 150′ before a runway holding position marking. MarkingĮnhanced taxiway centerline markings are used at larger airports to warn pilots that they are approaching a runway holding position marking.
The following table indicates the markings for each type of runway. The three runway types are: visual, nonprecision instrument, and precision instrument. The markings on a runway depend on the types of approaches conducted to the runway. The markings are 100′ to 150′ in length, depending on the runway length. These two rectangular markings consist of a broad white stripe located on each side of the runway centerline and approximately 1,000′ from the landing threshold. They are spaced in 500′ increments, measured from the beginning of the runway.Īiming point markings serve as a visual aiming point for a landing aircraft. The markings consist of groups of one, two, and three rectangular bars symmetrically arranged in pairs about the runway centerline. Touchdown zone markings identify the touchdown zone for aircraft on a precision instrument approach. Shoulder markings consist of continuous yellow stripes used when needed to identify pavement next to the runway that is not intended for use by aircraft. These markings provide visual contrast between runway pavement and the ground. Side stripe markings consist of continuous white stripes located on each side of the runway. The stripes are 120′ in length with 80′ gaps. The letters differentiate between left (L), right (R), or center (C) parallel runways, as applicable.Ĭenterline markings identify the center of the runway and provide alignment guidance to aircraft during takeoff and landing. It is based on the magnetic heading of the runway centerline. The number is determined from the approach direction. 60′ Wideĭesignation markings are numbers and letters that identify a runway. The following table indicates the number of stripes when related to the runway width. Visual runways, those without an instrument approach, do not have threshold markings. These markings have eight stripes of uniform dimensions, or the number of stripes is related to the runway width. Runway threshold markings come in two configurations. Threshold markings identify the beginning of the runway that is available for landing. Threshold bars delineate the beginning of runways when a threshold has been relocated or displaced.
A demarcation bar is yellow since it is not located on the runway. Chevrons are yellow markings aligned with the runway that show pavement areas that are unusable for landing, takeoff, and taxiing.ĭemarcation bars delineate displaced runway thresholds from unusable pavement such as blast pads, stopways, or taxiways that precede the threshold.
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