I believe the Double Decker buses not being used have already
started depreciating. To make better use of them, instead of
storing them at depot, SMRT should temporarily deploy them on other
routes, while in return, put aside the old articulated buses in the
meantime. When Yishun Bus Interchange opens, then re-deploy them
back to Yishun routes, and re-deploy the old articulated buses
again.
I support your point. For instance, WPDEP can upgrade SD slots
on sv 187 to DD for the next two months. It can also use DDs on
feeder services, replacing the rigids and try them out. This way
capacity will get upgraded for 2 months and SMRT will really know
from a real, practical use, what is the capacity needs for
different services.
Better to experiment this way than just keep the buses in
depots. Now it is already 3 months lying idle.