SUPER ELEVATION: When a vehicle negotiates a curved path, it is subjected to an inward force know as centrifugal force. In order to resist this, the outer edge of the road is generally raised above the inner edge. This is know as super-elevation or cant or banking.
- The greater the super-elevation, more will be convenience to the slow moving traffic.
- The super-elevation should not be less than the camber.
- In the absence of super-elevation on road along curves, pot holes are likely to occur at the outer edge of the road.
- The maximum value of super-elevation is 1 in 15.
- The maximum rate of super-elevation is given by;
e = v2/225R
where. e = Rate of super-elevation
v = speed of the vehicle in kmph
R = Radius of curvature in meter
- To achieve higher speed of vehicles
- To increase the stability of fast moving vehicles when they negotiate a horizontal curve
- To decrease the intensity of stresses on the foundation.
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