Many thanks guys for all the feedbacks. There are still a few
more but is not ready yet.
Anyway, all these fantasy services have been introduced for 3 to 4
years time.
Service 71 is introduced when I was Secondary 2 that time in year
2001. Guess all of you know my age now. 
I studied in Xinmin which was moved from Hougang to Fernvale for a
period of time. After that, 371 is introduced to relieve the loads
of 163 from Sengkang to Xinmin.
So, I introduced this fantasy route 71, hoping that it can provide
a faster link from Fernvale to Sengkang as compared to 163 or 371.
Besides, it goes to Punggol too so that means I don't have to make
a transfer at the interchange.
For 74 and 147, those two services are plying the same route at
Hougang which one ventures into AMK, Bukit Timah and then West
while the other city then West. As some of you have mentioned, as
this two service provide great and valuable links, it is from a
passenger point of view beneficial for them to extend to Punggol.
The extension of 74, 147 routes were almost the same last time but
I have changed a little for 147 since its route is challenging and
considering the numerous traffic jams that the BCs encounter and
plus more roads at Sengkang and Punggol are open.
140 is a more of a supplementary service to provide a quick link
from Punggol to Yio Chu Kang Rd, Serangoon North areas, Bishan
areas. Besides, it provides a quicker link from Serangoon North,
AMK Ave 10 areas to the city as compared to 132. This service is
parallel with 132, 156 from AMK Ave 3 onwards if you have
noticed.
To sum up, in my opinion, with 3 and 83 only (plus 62 on Punggol
Field and 85 at Punggol Central) is insufficient. Besides, most of
the bus services plying at Punggol int will have to ply wither
Punggol Field or Punggol Central to get the passengers residing in
Punggol. Most of them will continue to go to Sengkang as there are
demand over there. So, I feel that in terms of duplication, it is
rather heavy. (For example, 71, 74, 140) However, with the Circle
Line coming up with Serangoon Station as the interchange, I will
expect more Punggol residents to utilise the MRT either at Punggol
Station or Sengkang MRT station to the Northern Central areas like
Bishan or transfer to NSL to AMK or YCK. Plus the increasing use of
LRT for Sengkang/Punggol residents to MRT stations as more
residential housing are built.
At that time, I guess 71, 140 can be withdrawn.
Once again, thanks for your opinions.
