ok. why they tell me no crossover?
To further on Veyron's explanation, I repeat:
You can use Mighty Minds 2010 Street Directory, as suggested by
one of the train fans, which is verified by me, for the route
details, how curve they should be etc. But there are no details on
X Overs, when should the train goes up slope and down
However, I will provide a tip on where are the X overs based on
today CCLD:
Marymount - Bartley skipped due to one can check youself.
(Later)
Bartley - Tai Seng:
Immediately after Bartley, there is a crossover towards right
(Call it Middle 2) which leads to KCD. Middle 2 can also crossover
to Middle 1, which is where the Bartley Slidings terminates (I got
board DNB before, I can attest) The reason why I call Middle 1 and
2, is because, you can check with Ang Mo Kio style, when
approaching BSD.
Note: As the sector is not included CCLD, what is the rest is I
dunno.
Diagram:

But tip:
Today CCLD again board DNB along with many people, who did not
managed to alight on time (Heard a staff complain on only 28 sec to
close the doors, while previously was about 40 secs, but that
caused delays)
What is after Tai Seng is that it is similar to Bartley, except
in Bartley slidings, the train must go to M1 via M2 before
terminates, but Tai Seng slidings does not need and can do
either.
Image:

Between Tai Seng - Paya Lebar does not have a crossover, except
when approaching Paya Lebar, it has such diagram:

Between Dakota and Mountbatten has no crossover.
Between Mountbatten and Stadium got a crossover similar to one
in Farrer Park & Little India, another middle track between
stations with dead end on each end. There are entrance and exit
points for either side (Clockwise / Anticlockwise).
Diagram --- I wont draw at the moment. Unless you request
it.
Between Stadium to Promenade has no crossover, but Promenade is
a stacked platform. Hence, it has double platform levels (Upper and
Lower platform) and for Marymount bound, the doors open on the left
while Dhoby Ghaut's door open on right.
One will curious why stack? According to my findings: The
opposite side, is actually an platform, with temporarily hoardings,
like before CCL after NEL's Dhoby Ghaut. When will the other side
platform open and use, I seriously wonder. There IS a tunnel there,
but no tracks and 3rd rail. I can confirm that becoz I peeped
through the end's wall. (So taking DNB does not help) But the
reason why stack is because for both direction, it has a super
sharp right turn (For Dhoby Ghaut bound) and a striaght crossover,
which is a dead end. I guess that will be used for Marina Bay
Extension (There are 31 CCL stations, so far, the last 2 --
Bayfront and Marina Bay will open in 2012).
Diagram:

Since CC4 is a stacked platform, then for both directions, it
will be at exact spot, but at different levels (Marymount bound is
the lower level one)
Between Esplandae to Bras Basah has no crossover, until
approaching Dhoby Ghaut, which is an X shaped crossover. For that,
refer to Willis CGL 0.5 or above should be able to do the trick.
The overrun in Dhoby Ghaut does not led to anway, similar to
Marymount, it is a dead end, instead of X shaped or whatever
crossover, at Harbourfront (NEL) slidings.