Page 378 - Planning and Design of Airports

Airport Lighting, Marking, and Signage 329

6–12''
9'(2.74 m)
(15–30 cm)
See Notes 1 and 2
3' (.91 m)
3'' (7.62 cm)

150' (45.72 m)

6'' (15.24 cm) 6'' (15.24 cm)

6' (1.83 m)
Note 1: Regardless of whether the Note 2: The taxiway centerline
centerline is 6 inches or 12 inches might have to be shifted either right
(15 or 30 cm) wide, the dashed lines or left so the enhancement does not
provided by the enhancements will go over a taxiway centerline light.
always be 6 inches (15 cm) in width.
FIGURE 8-28 Example of enhanced taxiway markings.

closed runways, the threshold, runway designation, and touchdown
markings are obliterated and crosses are placed at each end and at
1000 ft intervals. For temporarily closed runways, the runway mark-
ings are not obliterated, the crosses are usually of a temporary type
and are only placed at the runway ends. For permanently closed taxi-
ways, a cross is placed on the closed taxiway at each entrance to the
taxiway. For temporarily closed taxiways barricades with orange and
white markings are normally erected at the entrances.

Airfield Signage
In addition to markings, signage is placed on the airfield to guide and
direct pilots and ground vehicle operators to points on the airport. In
addition some signage exists to provide the pilots with information
regarding their position on the airfield, the distance remaining on a
runway, the location of key facilities at the airport, and often infor-
mative signage ranging from voluntary procedures to mitigate noise
impacts to warnings about nearby security sensitive areas. FAA
Advisory Circular 150/53040-18D describes the U.S. federal standards
for airport sign systems.