Page 275 - Planning and Design of Airports
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236 Airp o r t D e sign
10. Sufficient distance must be provided to comfortably deceler-
ate an aircraft after it leaves the runway. It is suggested that
for the present this distance be based on an average rate of
deceleration of 3.3 ft/s . This applies only to transport cate-
2
gory aircraft. Until more experience is gained with this type
of operation the stopping distance should be measured from
the edge of the runway.
A chart showing the relationship of exit speed to radii R and R ,
1 2
and length of transition curve L is given in Fig. 6-33.
1
ICAO has indicated the relationship between aircraft speed and
the radius of curvature of taxiway curves as illustrated in Table 6-22.
For high-speed exit taxiways ICAO recommends a minimum radius
4000
3600
L R 2
3200 1
R
1
2800 350
R = radius of entrance curve
1
L = length of entrance curve
1
2400 300
R 2 = radius of central curve Length L 1
Radius in feet 2000 250 L 1 , in feet
1600 Radius R 1 200
1200 150
Radius R 2
800 100
400 50
0 0
0 10 20 30 40 50 60 70
Speed, in miles per hour
FIGURE 6-33 Radii of curvature and entrance curves for taxiways.