http://www.straitstimes.com/forum/letters-on-the-web/two-routes-for-same-bus-service-number
"I did not reach my destination of Woodlands Street 41
when I took bus service 912.
Subsequently, I discovered that this same service has two
separate routes, serving both the eastern and western parts of
Woodlands.
Looking at the route directory or the bus number,
there is no way a customer can identify which route the bus
will be plying.
I wrote to the Land Transport Authority (LTA) in July and
received a reply confirming that "Service 912 is an intra-town
feeder that serves both Woodlands Avenue 7 (eastern part of
Woodlands Town) and Woodlands Centre Road (western part of
Woodlands Town) areas".
The e-mail went on to explain that there are "separate
boarding berths for the same service".
I replied to the LTA's e-mail, explaining that if the same
service number is serving different routes, it confuses
commuters.
A simple 912A and 912B would help commuters identify
which bus to board."
Some pax just don't even bother checking the berth destination
whether it goes to the East or West loop.. Even having 912A and
912B doesn't mean that this confusion will be entirely solved
anyway..
Same thing happened to my mother at PSR Int back in 1997 when
SBS started TownLinks. She wanted to go to PSR St 21 that was
served by 357 (following 352 alignment) but boarded at the queue
for the direction towards St 71 (former 356 queue). Anyway, there
were two different colours (green for St 71, yellow for St 21) for
the respective queues, which were (and still are) located at
adjacent sawtooth berths.