Centerline Markings in Software

Generating QR in Software Centerline Markings

Runway centerline markings are white, located on the centerline of the runway, and consist of a line of uniformly spaced stripes and gaps The stripes are 120 ft long and the gaps are 80 ft long Adjustments to the lengths of stripes and gaps, where necessary to accommodate runway length, are made near the runway midpoint The minimum width of stripes is 12 in for visual runways, 18 in for nonprecision instrument runways, and 36 in for precision instrument runways The purpose of the runway centerline markings is to indicate to the pilot the center of the runway and to provide alignment guidance on landing and takeoff

Aiming points are placed on runways of at least 4000 ft in length to provide enhanced visual guidance for landing aircraft Aiming point markings consist of two bold stripes, 150 ft long, 30 ft wide, spaced

Runway Length 7990 ft (2436 m) or greater 6990 ft (2130 m) to 7989 ft (2435 m) 5990 ft (1826 m) to 6989 ft (2129 m) 4990 ft (1521 m) to 5989 ft (1825 m) TABLE 8-4

Markings on Each End Full set of markings Less one pair of markings Less two pairs of markings Less three pairs of markings

Runway touchdown zone markings are white and consist of groups of one, two, and three rectangular bars symmetrically arranged in pairs about the runway centerline These markings begin 500 ft from the runway threshold The bars are 75 ft long, 6 ft wide, with 5 ft spaces between the bars, and are longitudinally spaced at distances of 500 ft along the runway The inner stripes are placed 36 ft on either side of the runway centerline For runways less than 150 ft in width, the width and spacing of stripes may be proportionally reduced Where touchdown zone markings are installed on both runway ends on shorter runways, those pairs of markings which would extend to within 900 ft of the runway midpoint are eliminated In addition, sets of touchdown zone markings are eliminated for shorter runways, as specified in Table 8-4

Runway side stripes consist of continuous white lines along each side of the runway to provide contrast with the surrounding terrain or to delineate the edges of the full strength pavement The maximum distance between the outer edges of these markings is 200 ft and these markings have a minimum width of 3 ft for precision instrument runways and are at least as wide as the width of the centerline stripes on other runways

At some airports it is desirable or necessary to displace the runway threshold on a permanent basis A displaced threshold is one which has been moved a certain distance from the end of the runway Most often this is necessary to clear obstructions in the flight path on landing The displacement reduces the length of the runway available for landings, but takeoffs can use the entire length of the runway The FAA

NOTES 1 RUNWAY SIDE STRIPES, WHEN USED ON THE RUNWAY, EXTEND INTO THE DISPLACED AREA 2 RUNWAY MARKINGS (EXCEPT HOLDING POSITION MARKINGS), INCLUDING THOSE IN THE DISPLACED THRESHOLD AREA, ARE WHITE FEET 10 eg, 3 DIMENSIONS EXPRESSED AS METERS 3 RUNWAY SIDE STRIPES (WHITE) TAXIWAY CENTERLINE MARKINGS (YELLOW) 45 135 SEE FIGURE 11, DETAIL A 80 24 120 36 100 30 STANDARD RUNWAY MARKING 20 6

5 15 10 3 THRESHOLD BAR (WHITE)

15 5

TAIL 15 45 20 24 DETAIL A (ARROW)

5 15

RUNWAY WIDTH TAXIWAY EDGE STRIPES (YELLOW) 100' (30 M) < 100' (30 M) < 60' (30 M)

SPACING BETWEEN ARROW HEADS W/4 W/3 W/2

SPACING TO RUNWAY EDGE W/8 W/6 W/4