I think SBS HAVE to install the EDS on
ALL the buses with destos that are not going to retire
soon, since the tender system is going to come in place,
implemented by LTA.
Meaning that some particular services might jump between the 2
bus operators (or 3 if there’s a new one in future) every several
years. It would be a waste if SBS make new destos for
some particular bus routes, and then after a few years, lose them
to other bus operators after the bid.
acrylic plates are not that expensive to print.. especially if
ordered in bulk (say 20-30 pieces) for a service's entire bus
fleet.