Which of the statement is/are true about superelevation ?
(i) For mixed traffic condition, superelevation is calculated corresponding to 75 % design speed.
(ii) For hilly terrain, maximum superelevation is 7 %.
(iii) In equilibirium superelevation, effect of coefficient of friction is considered.
1
Only (i)
2
Only (iii)
3
(i) and (iii)
4
(i) and (ii)