The radius of the horizontal curve (R), for a design speed of (V) 100 kmph with the maximum values of (superelevation) e = 0.07 and (coefficient of friction) f = 0.15 can be calculated using which of the following equations?
1
\(e + f=\frac{V^3}{137\space R} \)
2
\(e + f=\frac{V^2}{127\space R} \)
3
\(e + f=\frac{V^2}{12 \space R} \)
4
\(e + f=\frac{V^3}{127 \space R} \)