Calculate the turning radius of the taxiway for an airport serving large subsonic jet planes. The design speed of turning is 60 kmph and assume friction coefficient between tyre and pavement surface as 0.15.

Concepts:

For taxiway design, the turning radius is given as:

\(R = \frac{V^2}{125 f}\)

Where,

 R is the radius of the curve in m,

V is the speed in km/hr and

f is the coefficient of friction between the tire and pavement surface

Further,

For airports serving large subsonic jet transports, the minimum value of the radius of curvature is 120 m and for supersonic transports, a minimum radius is 180 m.

Calculation:

Given: f = 0.15, V = 60 km/hr

The turning radius based on the above formula is calculated as:

\(R = \frac{60^2}{125 \times 0.15 }\)

R = 192 m

For subsonic transports, the minimum radius recommend is R_min = 180 m

Therefore, the final design radius will be the maximum of the above two values i.e The radius for the taxiway is 192 m.