The following statements are made related to the lengths of turning lanes at signalised intersections:

1. $1.5$ times the average number of vehicles (by vehicle type) that would store in turning lane per cycle during the peak hour.
2. $2$ times the average number of vehicles (by vehicle type) that would store in turning lane per cycle during the peak hour.
3. Average number of vehicles (by vehicle type) that would store in the adjacent through lane per cycle during the peak hour.
4. Average number of vehicles (by vehicle type) that would store in all lanes per cycle during the peak hour.

As per the IRC recommendations, the correct choice for design length of storage lanes is:

1. Maximum of (ii) and (iii)
2. Maximum of (i) and (iii)
3. Average of (i) and (iii)
4. Only (iv)