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Radius of Horizontal Curve

What will be ...

Question

What will be the ruling radius of a horizontal curve on a National Highway for a design vehicle speed of 100 km/h, assuming allowable super elevation to be 7 % and lateral friction as 0.13 ?

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Solution

$R_{r u l i n g} = \frac{V^{2}}{127 (e + f)}$

$= \frac{(100)^{2}}{127 \times (0.07 + 0.13)} ≃ 395 m$

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