Come, I amend Hougang part a bit
Hougang Ctrl, Ave 4, Buangkok Green, YCK Rd
Currently, that section of Ave 4, between Buangkok Rd and Ave 9
do not really have a direct route to Hougang. I am guessing that
this is also the cause of the high loading on 109 from Serangoon to
Hougang. Especially a Circle Line user. By the time a commuter
transfer lines, go to Hougang, and prepare to transfer to either
101 or 161, the one at Serangoon may already reach Serangoon North,
or at least the bus have arrived. If the Hougang commuter got lucky
and 161/101 arrived immediately, 101/161 and 109 may reach Ave 4 at
the same time. If not, 109 will most likely reach there first.
This is because both 101 and 161 turn to serve other parts of
Hougang before heading to Hougang MRT. If this is implemented, it
will reduce loading on 70/103 at YCK Rd and Buangkok Green
commuters have an alternative to 43/325
Not true. 161 is quite direct from HG MRT to HG Ave 4. But if
you travel by CCL, taking 109 would make sense. NEL, take 161
ofcourse.