taxiway markings removed or obliterated. Temporarily closed taxiways may either have
the crosses painted yellow on the surface or formed by tape or plywood secured in
Figure 4-7 -- Closed taxiway markings.
Hazardous Area Markings
Hazardous or failed areas of a taxiway are marked to assure avoidance by taxiing
aircraft. The hazardous area on the traffic side of the taxiway is outlined with a pair of
parallel retroflective yellow lines. The area is also outlined with yellow or orange
rectangular flags not less than 18 inches on each side. Orange (or orange and white)
cones can also be used. Flags and cones should be 30 inches or less in height and
fastened in position to resist movement from taxiing aircraft.
Runway Overrun Markings
Paved overrun areas could easily be mistaken for a landing area. Therefore, runway
overrun markings are used on them. These markings are in the shape of a chevron or
partial chevron and are painted with nonretroreflective yellow paint. The apex of each
chevron is at the runway centerline and each chevron leg makes an angle of 45
degrees to the centerline. The chevrons are equally spaced at 100-foot intervals
through the paved overrun area. The legs of the chevrons are 3 feet wide and extend
out to the edge of the paved area but not more than 100 feet on each side of the
centerline (see Figure 4-8).