Correct Answer - Option 2 : 1 in 15
Concept:
Super-elevation:
It is the inward transverse slope provided throughout the length of the horizontal curves to counteract the centrifugal force which tends to pull out the vehicle in an outward direction and therefore to check the tendency of the vehicle to overturn or skid.
The value of super-elevation e is given by,
\({\rm{\;e}} \ + f = \frac{{{{\rm{V}}^2}}}{{{\rm{gR}}}}\;\)
Where,
V = speed of the vehicle, R = radius of the horizontal curve, g = acceleration due to gravity, f = Lateral friction.
According to IRC, the maximum superelevation is given by:
|
Type of Terrain
|
emax
|
|
Plain and rolling
|
7%(1 in 15)
|
|
Hilly road
|
10%
|
|
Urban road
|
4%
|
