Airport Engineering
As per ICAO recommendation, the rate of change of longitudinal gradient per 30 m length of vertical curve for A and B type of airports is limited to a maximum of

0.003
0.002
0.001
0.004

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Airport Engineering
The capacity of parallel runway pattern depends upon

Lateral spacing between two runways and weather conditions
Lateral spacing between two runways and navigational aids available
Weather conditions and navigational aids available
Lateral spacing between two runways, weather conditions and navigational aids available.

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