think it might be just few buses doing 170A (maybe 20-30 min
frequency) .the checkpoint congestion is creating problem on the
operation of 170... further with DTL open, pax might want to
transfer to 170/170A from DTL2 station....
170A buses might layover at the woodland centre carpark... and
depending on situation, there might be even some shorter 170A which
start at Kranji MRT and terminate at woodland train station...(when
170X buses are stuck at causeway)...
I think should be better frequency as the current fleet of Svc
170 stuck at the Causeway... Hmm, I think that the bus will end at
the designated stop and then will start afresh at Kranji MRT
Station, unless they want to start afresh at the next bus stop (Opp
Blk 1A)...
It looks like to be the former 170 shortworking trip service
from Queen Street to the Train Checkpoint (If anyone could remember
it on the Volvo B10M Mark II)