The design of horizontal transition curve length for highways should take into account
1
three factors namely, allowable values of rate of change of centrifugal acceleration and superelevation and the minimum length formula given by the IRC
2
two factors, namely, comfort and rate of change of superelevation
3
two factors, namely, rate of change of superelevtion and minimum length formula given by the IRC
4
only one factor, namely, the rate of change of centrifugal acceleration