formula for super elevation

The equation for highway superelevation is

$$e + f = dfrac{V^2}{gR}$$

where:

• $e$ is the rate of superelevation in %,
• $f$, the friction coefficient of the pavement,
• $V$, the velocity,
• $g$, the gravitational acceleration,
• $R$, the radius of the curve.

Here is the formula to calculate Superelevation.

e + f = V*2 / 127R

where

e = Rate of Superelevation in %

f = Lateral Friction Factor

V = Velocity of the Vehicle in m/s

R = Radius of Circular Curve in Meters