Surveying & Geomatics

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Radius from Degree of Curve

Radius of a circular road or rail curve from its degree of curve.

Formula

R = \frac{5729.58}{D}

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Variables

RRadius (ft)

DDegree of curve

Example

D=4°: R = 1432.4 ft

Did You Know?

The constant 5729.58 is simply 180×100/π, tying the curve's degree to its radius.

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