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incorporating the reduction of this value to 550ft (167m) for Cat II/III operations and 500ft (152m) for Cat I
operations.
Within the frame of ICAO rules, if the runway-taxiway separation at an alternate airport with few (if any)
foreseeable A380 movements does not comply with code F SARPs, restrictions on the simultaneous use of
the runway and taxiway can be considered.
For this, several cases can be distinguished, based on code E separation distances:
a) Landing of an A380 on a non instrument runway, Runway – taxiway separation is 107.5 meters,
The runway – taxiway separation is based on a half runway-strip width of 75 meters plus half the
wingspan of the aircraft on the parallel taxiway. The half runway strip width of 75 meters is equal for
both ICAO code E and code F. Landing (under VFR) of an A380 in this case may not restrict the
use of the parallel taxiway for aircraft with a wingspan of less than 65 meters. No specific
procedures are required.
b) Landing of an A380 on an instrument runway, Runway – taxiway separation is 182.5 meters,
The runway – taxiway separation is based on a half runway strip width of 150 meters plus half the
wingspan of the aircraft on the parallel taxiway. The half runway strip width of 150 meters is equal
for both ICAO code E and code F. Landing of an A380 in this case will not restrict the use of the
parallel taxiway for aircraft with a wingspan of less than 65 meters. No specific procedures are
required
c) Take-off of an A380, runway – taxiway separation is 107.5 meters,
For the take-off case the half runway strip width equals 75 meters plus half the wingspan of the
aircraft on the parallel taxiway. The half runway strip width of 75 meters is equal for both ICAO
code E and code F. Take-off of an A380 may not restrict the use of the parallel taxiway for aircraft
with a wingspan of less than 65 meters. No specific procedures are required
d) Take-off of an A380, runway – taxiway separation is 182.5 meters,
For the take-off case the half runway strip is 75 meters plus half the wingspan of the aircraft on the
parallel taxiway. The half runway strip half-width of 75 meters is equal for both ICAO code E and
code F. Take-off of an A380 will not restrict the use of the parallel taxiway even for A380 aircraft.
No specific procedures are required.
e) Taxiing of an A380 on a parallel taxiway, runway – taxiway separation is 107.5 meters,
The A380 wingtip will infringe the runway strip with a distance of 7.5 meters. Operations on the
runway should therefore temporarily be halted until the A380 has left the parallel taxiway.
f) Taxiing of an A380 on a parallel taxiway, runway – taxiway separation is 182.5 meters,
The A380 wingtip will infringe the runway strip with a distance of 7.5 meters5. Take-off operations
can be operated as normal but instrument landings may temporarily be halted until the A380 has
left the parallel taxiway. Non instrument landings however could be operated normally
From the above it can be concluded that the critical point is not the operation of an A380 on the runway, but
rather the operation of an A380 on the parallel taxiway.
Recommended alternative measures, operational procedures and operating restrictions for airports
that can-not comply with ICAO requirements or AACG recommendations related to runway – taxiway
separation.
 When an A380 uses the parallel taxiway next to a runway, operations on that runway should be
restricted or even halted if the runway – taxiway separation is less than 115 meters (under visual
conditions).
[Comment: in annex 14, the width of the runway strip is a permanent characteristic attached to the runway, not to the
type of operations and the aircraft size. It may be necessary to note that proposals b, d, and f consist in saying that an
instrument runway in visual conditions can be operated with the clearances of a non-instrument runway, with an
acceptable level of safety. In practice, this may need to be validated by ATC services and approved / accepted by the
local authority]
5 For an A380 taxiing on a code E parallel taxiway, the distance from runway centerline to the A380 wingtip is 142.5m.
With respect to FAA requirements, for a 747-400 taxiing on a Group V parallel taxiway, the distance from runway
centerline to the 747 wingtip is only 122m.
draft
9
3.4 Obstacle Free Zone
The Obstacle Free Zone protects the airspace above the inner approach surface, the inner transitional
surfaces, the balked landing surface and that portion of the strip bounded by these surfaces. The OFZ may
not be penetrated by any fixed obstacle other than one, which is of low mass and frangibly mounted..
The width of the lower surface of the OFZ is 120 meters for code E (and lower) aircraft. For code F aircraft
　
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