many maps here.

above---under construction
top:confirmed to be completed by 2020
middle:public housing areas



bottom:confirmed to be completed by 2018

confirmed to be completed by extension in Tuas by 2015.
contd from opening posting
...
When completed, moving within the city centre will be a breeze,
with a train station every 400m, or a five minute walk away, said
Transport Minister Raymond Lim on Friday morning when he unveiled
part-two of the changes to the land transport system.
Thomson Line (see attached map)
From the heart of Marina Bay, the Thomson Line (or TSL) will travel
northwards, through the Central Business District and up through
Ang Mo Kio all the way to Woodlands connecting estates such as Sin
Ming, Kebun Baru, Thomson and Kim Seng which do not now have a
direct MRT link.
VIDEO
Faster, easier, more comfort on MRT by 2020
(0:53)
RELATED LINKS
Thomson Line
Easten Region Line
North-South Line
Tuas Extension
Rail network by 2020
Easten Region Line (see attached map)
The Eastern Region Line (or ERL), from Marina Bay, will serve the
residential estates of Tanjong Rhu, Marine Parade, Siglap, Bedok
South and Upper East Coast, and link them to Changi in the
east.
The TSL and the ERL together will add 48km to the rail network. The
Government has given the go-ahead for the TSL to be built by 2018,
and the ERL by 2020.
Mr Lim said the TSL and ERL will shorten journey times and
significantly enhance the connectivity of the rail network.
Commuters staying in Sin Ming, for example, can save 20 minutes out
of their current 45-minute journey to the city, whereas a trip from
Marine Parade to Marina Bay on the ERL would take about 20 minutes,
almost as fast as travelling by car.
New extensions to North-South and East-West Lines (see attached
maps)
The North-South and East-West Lines will also be extended and
should be completed around 2015.
The North-South Line, which now ends at the Marina Bay station in
the south, will be extended 1-km southwards to serve upcoming
developments in the southern Marina Bay area, such as the new
cruise terminal in Marina South. The East-West Line will be
extended by another 14km into Tuas.
Presently, a commuter who lives in Clementi and takes the MRT to
work in Tuas has to alight at Boon Lay station and then take a
35-minute bus ride to get to his workplace. With the new Tuas
Extension that brings the East-West line right into the heart of
Tuas, more of the journey will be on the high speed MRT, reducing
his journey time by 20 minutes.
Doubling of rail network by 2020 (see attached map)
Mr Lim said the new rail lines will cost some $20 billion to build,
over and above the $20 billion that government has already
committed for the on-going Boon Lay Extension (BLE), the Circle
Line (CCL) and the Downtown Line (DTL).
......
'Together with the rail lines now under construction, the new rail
lines will double our network from today's 138km to 278km in 2020.
We expect our rail network to carry 3 times as many journeys,
rising from today's 1.4 million a day to 4.6 million in
2020.'
He added that many more people will be served by the MRT, and they
will be able to use it to get to many more places.
The density of the rail network will increase by 60 per cent, from
31 to 51 km per million population by 2020, comparable to cities
like New York and London, and surpassing Hong Kong and Tokyo.
Turning to the existing rail lines, Mr Lim said train ridership is
increasing steadily and commuters have said that they are feeling
the squeeze, especially on the North-South and East-West
lines.
'Now, we are far from the crowded conditions of Tokyo trains, which
Mr Norman Chong, a Singaporean who has lived in Tokyo for 10 years,
describes as being 'so packed that bodies are crushed against one
another.' He calls it his 'regular morning massage',' said the
Minister. 'Other MRT users have likened the average peak period
loading on our trains to an off-peak crowd in Shanghai.'
He said LTA is closely monitoring the passenger loading on
trains.
To ensure a more comfortable ride for commuters, LTA has worked
with the train operators to run 93 additional train trips per week
during the morning and evening periods from February 2008 on the
North-South East-West and the North-East lines. For commuters, this
will mean less crowded trains and a reduction in waiting time by
about 10 to 15 per cent during peak hours.
Additionally, the carrying capacity of the North-South and
East-West Lines will be expended, with more trains to be
added.
When completed in about four years' time, their carrying capacity
will be increased by a further 15 per cent, and commuters can look
forward to shorter peak waiting times of two minutes, compared to
the current 2.5 to 4.5 minutes at stretches that experience heavy
loading, and an even more comfortable ride, assured Mr Lim.
DTL 3 to be brought forward by 2 years
The Minister also announced that Stage 3 of the Downtown Line (DTL)
will now be completed two years earlier - from 2018 to 2016 - to
benefit residents of Bedok Reservoir and Tampines.
It will be ready just one year after that of DTL Stage 2 serving
the Bukit Timah corridor.
Earlier opening of Circle Line in 2009
He also have another piece of good news.
The Circle Line (CCL), which was due to open from 2010 onwards,
will now open its Stage 3 segment in mid-2009 to benefit residents
in the north and north-east.
This CCL segment connects Bishan station on the North-South Line
and Serangoon station on NEL and opens up multiple new connections
for residents in the north and north-east.
With the CCL 3, Serangoon residents will take only 25 minutes to
get to Yishun by transferring to the North-South line at Bishan
station, compared to 45 minutes by bus or by taking the NEL all the
way to Dhoby Ghaut before transferring to the North-South
line.
As for residents staying in Marymount, Lorong Chuan and Bartley,
they will enjoy more seamless and direct travel to the city and
other parts once CCL 3 commences operation.
More Circle Line stations will be opened
Commuters can also look forward to more stations on the Circle
Line. This will enhance the reach and connectivity of the Circle
Line, and allow many more people to benefit from the MRT.
'We had earlier decided to build the Thomson and West Coast
stations as shell stations and fit them out only when there are
sufficient developments around them. As the pace of development
around these stations is picking up, LTA will now fit out these
stations and open them together with the other CCL stations,' said
Mr Lim.
'To enhance the accessibility of the Marina Bay area to the rest of
the island, LTA will also build and open the Marina Bay station as
part of the CCL extension beyond Bayfront station in 2012.'
'With all these developments that I have highlighted, commuters can
look forward to new extensions or stages of new lines opening
almost every other year until 2020.'