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**Question 1. A broad gauge railway line passes through a horizontal curved section (radius = 875 m) of length 200 m. The allowable speed on this portion is 100 km/h. For calculating the cant, consider the gauge as centre-to-centre distance between the rail heads, equal to 1750 mm. The maximum permissible cant (in mm, round off to 1 decimal place) with respect to the centre-to-centre distance between the rail heads is_______ [2019 : 2 Marks, Set-II]Solution:**

(b)

(c)

(d)

Airport Reference Temperature = 22.65° C

Effective Gradient = 1%

Runway length = 2000 m under standard conditions.

Runway length correction for T°C.

=> Correction for elevation

Corrected runway length = 2249.67 m

=> Corrected standard T° at 535 m elevation

= 15°C - (0.0065 x 535) = 11.52°C

Correction for T°

Corrected Runway length

= 2249.67 + 250.39

Combined elevation and temperature correction

= 500 m < (0.35 x 2000)

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