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 + \dfrac{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.

Click here to continue reading

Horizontal Curves Definitions and Formulas

Horizontal Curve Formulas

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

L = RI_{\text{radians}}

L = \dfrac{RI 2 \pi}{360^{\circ}}

 R = \dfrac{5729.578}{D}

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

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

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

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

Click here to continue reading