256 seems to have kenna fleet downgrade from DDs to SDs on some
of its fleet as I constantly see Citaro and KUBs appeared on this
service often.
But not surprising anyway since the ridership of 256 seems
low.
256 seems to be having SD perms based on my observations for the
past three weeks as 256 have SD operating on both weekdays and
weekends on a regular basis.
Based on my observations, I
think 256 have a EIV KUB perm and a Citaro perm (require
confirmation as I only spot it at Joo Koon Interchange and Pioneer
MRT at different timings of the day, I suspect SBS8089T is a perm
for 256 but requires confirmation)