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AIM

10/12/17

2

−3−19

Airport Marking Aids and Signs

FIG 2

−3−23

Helicopter Landing Areas

e. Temporarily Closed Runways and Taxiways.

To provide a visual indication to pilots that a runway
is temporarily closed, crosses are placed on the
runway only at each end of the runway. The crosses
are yellow in color.  (See FIG 2

−3−22.)

1.

A raised lighted yellow cross may be placed

on each runway end in lieu of the markings described
in Subparagraph e,Temporarily Closed Runways and
Taxiways, to indicate the runway is closed.

2.

A visual indication may not be present

depending on the reason for the closure, duration of
the closure, airfield configuration, and the existence
and the hours of operation of an airport traffic control
tower. Pilots should check NOTAMs and the
Automated Terminal Information System (ATIS) for
local runway and taxiway closure information.

3.

Temporarily closed taxiways are usually

treated as hazardous areas, in which no part of an
aircraft may enter, and are blocked with barricades.
However, as an alternative, a yellow cross may be
installed at each entrance to the taxiway.

f. Helicopter Landing Areas.   

The markings

illustrated in FIG 2

−3−23 are used to identify the

landing and takeoff area at a public use heliport and
hospital heliport. The letter “H” in the markings is
oriented to align with the intended direction of
approach. FIG 2

−3−23 also depicts the markings for

a closed airport.

2

−3−7. Airport Signs

There are six types of signs installed on airfields:
mandatory instruction signs, location signs, direction
signs, destination signs, information signs, and
runway distance remaining signs. The characteristics
and use of these signs are discussed in Para-
graph 2

−3−8, Mandatory Instruction Signs, through

Paragraph 2

−3−13, Runway Distance Remaining

Signs.

REFERENCE

AC150/5340

−18, Standards for Airport Sign Systems for Detailed

Information on Airport Signs.