My first trivia to be done in a proper fashion, don't rubbish me
for this thx.
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There are altogether 18 bus services(A to R) in this trivia,
with a mix of SBST and SMRT Buses services. All services are
technically trunk services.
A is a relatively new service(under three years) and allows
people from this small town Z in the East a direct connection to
the city. This town Z has no feeder/townlink services going through
it and does not have an Int/Ter.
B is a cross territorial trunk service that now operates from an
Interchange in the East. During its time at this Interchange in the
East, this service has been shortened twice to its current route.
It operated to another Interchange in the East(which is now closed)
before being moved to the current one more than 25 years ago.
C is a loop service which has high demand. However it has a full
fleet of SDs due to height restriction at two roads along its
route. Of which one of the two road it meets G. This road has a
hospital which is quite small but old. Thus G also has a height
restriction imposed on it and does not have DDs too.
D is a service which was once called the longest loop service in
Singapore. Not any more. This service has been rerouted to this
Interchange. A previous service operated from this Interchange to
this terminal. After that service was terminated, D was amended to
serve the Interchange. The other terminating point for D is the
same terminal that the previous service used to terminate at. D
also has a height restriction, thus no DDs.
E is a WAB service. It has consistent high loads throughout the
week but makes a big round at its terminating point in the Central
area(but outside of CBD).
F is a service which just a few days ago received a very
interesting cameo. It has a height restriction too, and is a "loop
service", though it runs from an Interchange in the East to this
Terminal.
G is a cross territorial trunk service which has a height
restriction, as mentioned above. It goes through many narrow
roads(one laners) along its journey from East to West.
H is a short distance trunk. This service is unique because
there are no resting facilities for BCs at the start/terminating
point. There is also something unique about the perm buses on this
service. DDs cannot be used on this route at all. This service has
a low demand.
I can also be considered a relatively new service. One of its
terminating points is at an Interchange in the Central/North area
of Singapore. This service used to have a lot of different bus
types perm-ing on this route.
J is a WAB service. One of its terminating points is at a
Terminal. One of its perm B9TLs has a very horrible handbrake
sound(akin to a gorrilla's explosive fart). This service has
exceptionally high demand. It also passes by an Interchange in the
North-east.
K is a service which go through hilly terrain but has perm
B9TLs. Also high demand service, and terminates at a Terminal.
There is exceptionally high demand when a University, two
polytechnics and a few schools along this stretch of road have
lessons. It has a Fast Forward service Ke and K starts
from this Interchange where J has a stop outside.
L starts from the same Interchange as K and terminates at an
Interchange which two other services A and D ply too...
M is a cross territorial service that duplicates K for a very
long distance. It faces high loading during school terms...
N and O are from the same Interchange. N loops at an MRT Stn and
the Interchange near that station has service Q. N duplicates K and
M for a few stops along a certain road. N also has high loadings
during school term. O loops at a Terminal which B, G, and K ply
to.
P is a service renowned for its extremely high loading and
frequencies. This service duplicates D for a few stops along a few
roads. It provides a quick link from the Central district to the
North-west of Singapore.
Q is a cross territorial trunk service from East to West. High
loadings as it passes by numerous schools. It is also a WAB
service. This service passes through the CBD.
R is a service which goes to a very "ulu" part of Singapore. It
only meets P for a few stops. However it has high loadings during
Friday and Sunday nights.
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A, C, E and I terminate at the same Interchange.
B, F and J terminate at the same Interchange.
B, G, K, and O terminate at the same Terminal.
A and E branches out from the Interchange in the same way but A
goes straight while E turns right. C and I branch out from the
Interchange in the same direction but do not meet at bus stops as C
turns left while I goes straight. C and E meet along a nearby Town
from that Interchange. However C takes a much more direct(and thus
faster) routing than E. There will be a bus stop X near a NKF/KDF
place whereby A, C, and E meet. After that bus stop C will go
straight, while A and E turn left. Before this bus stop however, C
and E meet each other for 3 bus stops(in each direction). A, C, E,
and this time with I will meet yet again for a few bus stops. This
time, E will turn left, while A, C and I will go straight. It is
worthy to note that C, after turning left at bus stop X, continues
down this road till the other end. And A will meet C for the last
time along a road which A would not meet up with C again.
D and R meet each other for a few stops in the CBD. D would turn
left and meet A and both would terminate at the same Terminal. R
would turn right and continue its journey down to its terminating
point in the North-western region.
It can also be said that D and Q meet and diverge from each
other for a few times. Both are from the same Interchange. D and Q
come out from the Interchange in the same direction, diverge after
a condo, meet after a school and diverge after another school. They
then meet again along a road which is very famous due to an
incident. They diverge for the last time after a stop along this
also famous building/s.
F is a service that only meets services E and G in one direction
for only one bus stop. After this it turns right to continue on its
journey.
I is a service that duplicates 59 for many bus stops.
J, as said earlier, has good yields.
A, K, L, and M meet up at a bus stop on a road along an
expressway. That is the only time all four services meet up
together. M also stops along bus stops on a road along another
expressway.
R only meets up with one service, P. It then proceeds to west of
this Town, and after passing through it, will come back again. It
will stop outside and opp this famous mall in the Northwestern
region.
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Sorry if I made it too easy and straightforward. My first proper
trivia, please don't flame thank you.
Walao eh. Soooooooooooooooooooo long sia. 
Yahoo! My 777th post.