Civil Engineering - Highway Engineering - Discussion

Here, e is directly proportional to v^2 not to V.

It is directly proportionel to quare of velocity not directly proportionl to single velocity.

The formula is;

e + f= Bv2/gR.

Superelevation is directly proportional to the velocity of the vehicle. So, Option A is correct.

I think option A is the right answer for this.

Rate of super elevation e=E/B, & E=eB.
E = super elevated hight or superelevation.
But e = v^2/127R,
i.e E = v^2B/ 127R.

From this equation, we can conclude that super elevation (E) is directly proportional to the velocity of the vehicle, while the rate of superelevation (e) is inversely proportional to the width of the pavement (B).

I think Option A is the right answer cause the width does not affect the centrifugal force, so width is irrelevant, and for velocity is v2 is directly proportional, but here v2 is not given, we can say it is proportional, and g and R are indirectly proportional. So only the width has nothing to do.

I think opt A is the actual incorrect statement. Because from the formulae E= e (rate of super elevation) * B (width of pavement) for designing super elevation, for a perticular pavement width B is same but rate of superelevation can be changed. So width is not proportional to value of superelevation (E). Again superelevation is provided for counteract centrifugal force which is ev^2/gR. So opt C is correct statement. So. Who answered opt A I will go with them.

Directly proportional to velocity square I guess that's why it's incorrect here!

Directly proportional to the velocity and also inversely proportional to the radius of curvature.