Civil Engineering - Highway Engineering - Discussion

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!

For the total amount of superelevation, A, C, and D are correct.

So, incorrect can only be B as it is proportional to the square of the speed and not the speed only.

B is the right option.

Agree @Anuj statement.

Actually it is not directly proportional to width of pavement. Because,

Superelevation (e) = tan (tita) = sin (tita) = opp side /hyp= E/ width of pavement.

A is correct because velocity of vehicle is directly proportional to super elevation.

A is correct because velocity of vehicle is directly proportional to super elevation.

Please, anyone explain me how's answer B?

Super elevation =V*2/gR=F/W<=b/2h.
So, the answer is b.

As super elevation e+f=v^2/ (g.r) so it is directly proportional to the design speed option b is incorrect because the speed of vehicles is mentioned there in the statement not the design speed of the vehicle will differ for the different vehicle so it is incorrect.

Because s.e can be made on design speed.