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Blog Archives

Vertical Curves

Vertical Curves are nice! I think they are easier to solve than Horizontal Curves because they are essentially parabola equations (which you should be very used to). This is the formula for vertical curves

y(x) = y_{PVC} + G_1x + \frac{1}{2}Rx^2

y(x) is the elevation y at x horizontal distance into the curve from the start position

y_{PVC} is the starting elevation at x = 0.

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Horizontal Curves Definitions and Formulas

Horizontal Curve Formulas

L = 100\frac{I^{\circ}}{D^{\circ}}

L = RI_{\text{radians}}

L = \frac{RI 2 \pi}{360^{\circ}}

R = \frac{5729.578}{D}

T = R\tan\frac{I}{2}

LC = 2R\sin\frac{I}{2}

E = T\tan\frac{I}{4}

M = E\cos\frac{I}{2}

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