At the current frequency, 27 doesnt need DDs so much though some
DDs would be welcomed...
Why give DD to 163 when its peak hour frequency can still
be a miserable 20 min and the bus comes half-full only?
It might also surprise folks to know that 163 is marginally
faster than the LRT even with traffic-lights and bus-stops where
the track and road runs parallel. What stops me from taking 163 is
its god-awful frequency and the fact that it plies the ulu areas I
wouldn't go to on usual days.
In short: 163 should either have more buses or just leave it at
there, otherwise its just plain waste of resources. If they want to
do it, fine! Let it pass some MRT station like YCK Int
la....walao. THIS would be of so much more use to residents in
Sengkang West and justify any improvement in the service!
Case in point: I wanted to travel from Fernvale to Woodlands and
figured I would gamble with 163 and then switch to 161 with an
intermediate service in-between. Very bad choice.
It actually took longer to get from Sengkang West to East than
from Sengkang East to Woodlands BY BUS.
You tell me what use is 163 to me?
27 cannot use DD la, Airport tunnel 
As for 163, every town started from such bus sv level... Hope
LTA can do more to enhance the connectivity as more and more flats
are completed.