For a list of Projects u/c in Mumbai and their estimated deadlines, please see the post below this one.

The Mumbai Airport, Metro, Monorail, Suburban Railway, Bandra Worli Sealink, Worli-Haji Ali sealink and the Mumbai Trans-Harbour Bridge projects have separate threads in the Infrastructure and Transportation forums (http://www.skyscrapercity.com/forumdisplay.php?f=1247). Here are the links -


Mumbai International Airport thread
http://www.skyscrapercity.com/showthread.php?t=347144


Navi Mumbai International Airport thread
http://www.skyscrapercity.com/showthread.php?t=481410

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Mumbai Metro Updates!
http://www.skyscrapercity.com/showthread.php?t=451426


Navi Mumbai Metro Updates
http://www.skyscrapercity.com/showthread.php?t=1112765


Mumbai Monorail Project
http://www.skyscrapercity.com/showthread.php?t=608834


Mumbai Railway Discussions: Projects and Updates
http://www.skyscrapercity.com/showthread.php?t=719938

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Bandra-Worli Sealink thread
http://www.skyscrapercity.com/showthread.php?t=612663


Worli-Haji Ali Sea Link Thread
http://www.skyscrapercity.com/showthread.php?t=908686


Mumbai Trans-Harbour Bridge : Nhava-Sewri Sea Link
http://www.skyscrapercity.com/showthread.php?t=612688

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Supertalls

MARINE LINES | India Tower | 500+ m | 125 fl
http://img411.imageshack.us/img411/6938/dbtowerw.jpg (http://www.skyscrapercity.com/showthread.php?t=610347)


LOWER PAREL | World One | 442 m | 117 fl | APP
http://img576.imageshack.us/img576/4812/5740853730120755273org.jpg (http://www.skyscrapercity.com/showthread.php?t=1148571)



WORLI | Palais Royale | 67 fl | 320m
http://img210.imageshack.us/img210/7694/palais20royaleey0.png (http://www.skyscrapercity.com/showthread.php?t=624711)


JACOB CIRCLE | Orchid Heights | 300m | 80 fl x 2
http://img406.imageshack.us/img406/598/getimageo.png (http://www.skyscrapercity.com/showthread.php?t=624735)


PRABHADEVI | Orchid Crown | 3 x 75-80fl | 300+ m
http://img59.imageshack.us/img59/8285/elevation505.jpg (http://www.skyscrapercity.com/showthread.php?t=1112759)


TARDEO | Shreepati Skies | 301 m | 88 fl | App
http://img811.imageshack.us/img811/6132/110525shreepati5bighp4.jpg (http://www.skyscrapercity.com/showthread.php?t=634027)

My thoughts in bold. I am not mentioning the deadlines given by MMRDA but what I think when these projects complete.
Mumbai Metro I (Versova-Andheri-Ghatkopar corridor) - Dec 2013 Mar 2014
Monorail (Chembur - Wadala) - June 2013 around Diwali 2013
Monorail (Wadala - Gadge Maharaj Chowk) - Dec 2014 ?? No idea here. But may go in 2015

Navi Mumbai Metro Line 1 Phase 1 - Dec 2014 Currently deadline is may 2015. May get over around Diwali 2015

Mumbai International Airport New Terminal (SW Pier?) - Dec 2013 ?? No idea Here.
Navi Mumbai International Airport - start Dec 2013 end Dec 2018 Cant say anything until construction starts.


SEAR - Dec 2013??
Eastern Expressway - Feb/Mar 2013 and June 2013 (opened in phases) No idea Here.

Sion Panvel Expressway - June 2014 (may be delayed to Dec 2014)
SCRL - Dec 2013?? Mid 2014
Milan Subway - June 2013 ??
Jogeshwari ROB - June 2013 ??
Oshiwara ROB - June 2013 ??
Thane - Majiwada Flyover - April/May 2013
Thane - Kaburbawadi Flyover - Dec 2013


5th/6th line between Diva-Thane - Dec 2015?? (Kalyan-Diva and Thane-Kurla are already 6 lined) . Thane bridge is well u/c . I don't think this will take that long.

Nerul-Seawoods-Uran railway line - Dec 2014
6th line between MUmbai Central-Borivali - Dec 2015
Escalators on major stations on CR (Thane, Dombivli, Kalyan, Kurla, Dadar) and WR (Borivali, what else) - June/Dec 2013?? Lets wait till they actually start construction.



Not started yet
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Mumbai Metro III (SEEPZ - Nariman Point) - Start Dec 2013 end Dec 2018?? . AFAIK the date was Aug 2013 but we have not yet seen any movement on tenders for construction. Even though tenders are awarded this year. I think Construction will start only next year. End date will be around 2021



Peddar Road Flyover - ??
WR elevated corridor (Churchgate-Virar) - Start Dec 2013 end Dec 2018?? . Less chance of actual construction starting this year. Probably next year.

Vasai-Virar-Panvel corridor - Not approved
Mumbai Trans-Harbour Link (Sewri-Nhava) - Start Dec 2013 end Dec 2018??

fuwad and CG, do you know when Jogeshwari and Oshiwara ROBs are expected to be completed?

I am adding following

Line 2 of Metro - Start date 2015/2016 ?? If they do something in these 2 to 3 years.

Other Phases of Metro - Start date 2022 or even further as the first phase itself will not be done before that. I wish given the delay already happened. They start constructing both Phase 1 and Phase 2 lines simultaneously. Phase 3 can be done afterwards. Need to plan metro N/W till Kalyan Incase similar elevated corridor with A/C trains is not constructed for central line.

.