Figure 2-4. Runway numbers and letters.
c. Runway threshold marking. The runway
fixed distance markings are a part of the touchdown
zone markings but are used alone on certain
threshold marking consists of eight longitudinal stripes of
nonprecision instrument runways and visual runways as
uniform dimensions arranged symmetrically about the
indicated in paragraphs 2-3a and 2-3b.
runway centerline as shown in figure 2-2. The stripes
Runwayside stripe marking. Runway side
are 150 feet long and 5 feet wide and are spaced 14
inches apart except for the center space which is 8 feet.
stripes consist of continuous stripes located along each
d. Runway centerline markings. The runway
side of the runway to provide contrast with the
centerline markings are located on the centerline of the
surrounding terrain or to delinate the full strength runway
runway and consist of a line of uniformly spaced stripes
pavement area. The maximum distance between the
and gaps. The stripes are 120 feet in length, and the
outer edges of the stripes is 200 feet. The stripes have a
gaps are 80 feet in length as shown in figure 2-2.
minimum width of 36 inches for precision instrument
Adjustments to the length of the stripes and gaps, where
runways and are at least equal to the width of the runway
necessary to accommodate the runway length, are made
centerline stripes on other runways.
g. Displaced threshold marking. Displaced
near the runway midpoint. The minimum width of the
stripes is 12 inches for visual runways, 18 inches for
threshold areas which are used for takeoffs or rollouts
are marked as shown in figure 2-5a. Runway edge
nonprecision instrument runways, and 36 inches for
precision instrument runways.
stripes, where used on the runway, are continued along
the edges of the displaced threshold area. Taxiway
Touchdown zone markings consist of groups of one, two,
centerline markings may extend into the displaced area.
h. Relocated threshold marking. Relocated
and three rectangular bars symmetrically arranged in
pairs about the runway centerline as shown in figure 2-2.
threshold areas where the abandoned runway area is not
For runways less than 150 feet in width, the markings
used for taxiing are marked as shown in figure 2-5b and
and spaces are reduced proportionally, but the lengths
where used as a taxiway are marked as shown in figure
remain the same. On shorter runways, those pairs of
markings which would extend to within 900 feet of the
Markings for blast pads and stopway.
Markings for these areas are shown in figure 2-5b.