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whole surface of the taxiway for a distance of at least
150 m from that point, where the code letter is A.
3.9.1 1 Transverse slopes
Recommendation.- The transverse slopes of a taxiway
should be sufficient to prevent the accumulation of water on
the suface of the taxiway but should not exceed:
- 1.5 per cent where the code letter is C, D, E or F; and
- 2 per cent where the code letter is A or B.
Note.- See 3.13.4 regarding transverse slopes on an
aircrafi stand taxilane.
- 3 m above the taxiway, it will be possible to see the Strength of taxiways
whole surface of the taxiway for a distance of at least
300 m from that point, where the code letter is C, D, E 3.9.12 Recommendation.- The strength of a taxiway
or F; should be at least equal to that of the runway it serves, due
consideration being given to the fact that a taxiway will be
- 2 m above the taxiway, it will be possible to see the subjected to a greater density of traffic and, as a result of slow
whole surface of the taxiway for a distance of at least moving and stationary aeroplanes, to higher stresses than the
200 m from that point, where the code letter is 8; and runway it serves.
Annex I4 - Aerodromes Volume I
Note.- Guidance on the relation of the strength of taxi- to enable exit speecis under wet conditions of
ways to the strength of runways is given in the Aerodrome
Design Manual, Part 3. - 93 M h where the code number k 3 or 4; and
- 65 M h where the code number is I or 2.
Surface of taxiways Note.- The locations of rapid exit taxiways along a . -
runway are based on several criteria described in -the
3.9.13 Recommendation.- The suface of a taxiway Aerodrome Design Manual, Part 2, in addition to dzfferent
should not have irregularities that cause damage to aeroplane speed criteria.
structures.
3.9.16 Recommendation.- The radius of the fillet on
3.9.14 Recommendation.- The surface of a paved the inside of the curve at a rapid exit taxiway should be
taxiway should be so constructed as to provide good friction sufficient to provide a widened taxiway throat in order to
characteristics when the taxiway is wet. facilitate early recognition of the entrance and turn-off onto
the taxiway.
Rapid exit twiways
Note.- The following specijications detail requirements
particular to rapid exit taxiways. See Figure 3-3. General
requirements for taxiways also apply to this type of taxiway.
Guidance on the provision, location and design of rapid exit
taxiways is included in the Aerodrome Design Manual, Part 2.
3.9.15 Recommendation.- A rapid exit taxiway should
be designed with a radius of turn-offcurve of at least:
- 550 m where the code number is 3 or 4; and
- 275 m where the code number is I or 2;
3.9.17 Recommendation.- A rapid exit taxiway should
include a straight distance afier the turn-off curve sufficient
for an exiting aircraft to come to a full stop clear of any
intersecting taxiway.
3.9.18 Recommendation.- The intersection angle of a
rapid exit taxiway with the runway should not be greater than
45" nor less than 25" and preferably should be 30".
Twiways on bridges
3.9.19 The width of that portion of a taxiway bridge
capable of supporting aeroplanes, as measured perpendicularly
------
Radius of
Figure 3-3. Rapid exit taxiway
3-14
Chapter 3 Annex I4 -Aerodromes
to the taxiway centre line, shall not be less than the width of
the graded area of the strip provided for that taxiway, unless a
proven method of lateral restraint is provided which shall not
be hazardous for aeroplanes for which the taxiway is intended.
3.9.20 Recommendation.- Access should be provided
to allow rescue and* fighting vehicles to intervene in both
directions within the specijied response time to the largest
aeroplane for which the taxiway bridge is intended.
Note.- Ifaeroplane engines overhang the bridge structure,
protection of adjacent areas below the bridge from engine
blast may be required.
3.9.21 Recommendation.- A bridge should be constructed
on a straight section of the taxiway with a straight
section on both ends of the bridge to facilitate the alignment
of aeroplanes approaching the bridge.
3.10 Taxiway shoulders
Note.- Guidance on characteristics of taxiway shoulders
and on shoulder treatment is given in the Aerodrome Design
Manual, Part 2.
3.10.1 Recommendation.- Straight portions of a
taxiway where the code letter is C, D, E or F should be
provided with shoulders which extend symmetrically on each
side of the taxiway so that the overall width of the taxiway and
its shoulders on straight portions is not less than:
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