These svcs have great demand during the morning peak hours to
serve Temasek Poly students. Yet they kena fleet reduction of at
least one bus. Tat's bad. Though there is free shuttle svc, it wont
work out. For Svc 8 b4 SAFRA already full though the freq is gd.
Svc 15 b4 reach 1st bus stop in tamp already full. Svc 23 & Svc
69 at 1st or 2nd bus stop aft int already full. Those waiting at
SAFRA bus stop (though just 2 bus stops from TP main gate) most of
the time is unlucky.
N then now during PM Peak even worse. When u waiting at opp Temasek
Poly bus stop towards Ave 2. 2 (or even 3) buses of Svc 69 equals
to 1 Svc 23 n Svc 15. Mayb cos of the jam in eunos during peak hrs
for Svc 15 & for Svc 23 is at serangoon rd there. Wat can we
do?
I am sure not only TP is facing this kind of problems, the rest
of the four polys will face this kind of problem and
Pri/Sec/JC/ITE/etc. too.
For RP, TIB1062Y can fill in more info 
For NP, especially during AM peak hours(7+ to 8+am). The Bus
stop at Jalan Anak Bt.
All the bus services(51,62,75 and 184) will come at a go if not
need to wait for quite a while before the bus arrives.
Most of the bus will be packed especially for Sv 184 and need to
squeeze all the way in(BC will ask the passengers to move to
the rear) or wait for the next bus to arrive. The shuttle bus
is kind of useless also.
During PM peak hours(5+ to 6+pm), NP bus stop will be flooded
with people with most of them taking Sv 74 and 184. Clementi Rd
will face jams too.
For SP and NYP, anyone who studies at there can fill in more
info too.