Mathematics · Highway Geometry Calculations

Calculate the design radius of a rotary curve using the formula R = V2 / (127f) for a vehicle design speed (V) of 30 kmph and coefficient of friction (f) as 0.45.

Verified Solution4 OptionsUpdated: October 2026👁️1 View

130.50 m
215.75 m✓
322.34 m
412.73 m

Correct answer

15.75 m

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Calculate the design radius of a rotary curve using the formula R = V2 / (127f) for a vehicle design speed (V) of 30 kmph and coefficient of friction (f) as 0.45.

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Calculate the design radius of a rotary curve using the formula R = V2 / (127f) for a vehicle design speed (V) of 30 kmph and coefficient of friction (f) as 0.45.

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