Highway Engineering
For design, that length of transition curve should be taken which is

higher of (A) and (B)
based on allowable rate of change of centrifugal acceleration
smaller of (A) and (B)
based on rate of change of super elevation

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Highway Engineering
If b is the wheel track of a vehicle and h is the height of centre of gravity above road surface, then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should always be

less than b/2h and greater than co-efficient of lateral friction
less than b/2h and also less than co-efficient of lateral friction
greater than b/2h and less than co-efficient of lateral friction
greater than b/2h and also greater than coefficient of lateral friction

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