The equilibrium superelevation required to counteract the centrifugal force fully is given by -

[where V is the speed of vehicle in kmph and R is the radius of curve in metres]

- 1
  
  $\frac{V^{2}}{27.5 R}$
- 2
  
  $\frac{V^{2}}{75 R}$
- 3
  
  $\frac{(0.75 V)^{2}}{127 R}$
- 4
  
  $\frac{V^{2}}{127 R}$

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