Mumbai is in the middle of its biggest building boom. New metro lines, sea links, tunnels, rail lines and a second airport will change how the city moves over the next few years. This page lists every major upcoming infrastructure project in Mumbai, with its route, current status and expected opening date, all in one place.
Updated monthly ยท targets as announced
Metro lines being built
8 (and 2 approved)
Major road projects
7 tunnels, links & sea routes
Opening next
Metro 4/4A, 9, 5 (late 2026)
Big milestone year
2028
Last checked: October 2026 ยท Opening dates are official targets and may change.
Open Partly open Under construction Approved Planned
Metro lines
Mumbai already has four fully running metro lines (1, 2A, 3 and 7), plus open sections of Lines 2B and 9. These are the lines that are under construction or approved, from the closest to opening to the furthest away. See our Mumbai Metro guide and Mumbai Metro map for running lines, fares and timings.
| Line | Route | Status | Expected |
|---|---|---|---|
| Line 2B (Yellow) | D.N. Nagar โ BKC โ Kurla โ Chembur โ Mandale | Partly open | Full line by about 2028 |
| Line 4 & Line 4A (Green) | Wadala โ Ghatkopar โ Thane โ Gaimukh | Under construction | Gaimukh โ Cadbury Junction by Dec 2026; rest by about 2028 |
| Line 5 (Orange) | Thane โ Bhiwandi โ Kalyan | Under construction | Phase 1 (Kapurbawdi โ Dhamankar Naka) around Dec 2026 |
| Line 6 (Pink) | Swami Samarth Nagar โ JVLR โ Vikhroli | Under construction | In stages from 2027 |
| Line 7A (Red) | Gundavali โ Airport Terminal 2 | Under construction | 2027 |
| Line 9 (Red) | Dahisar (E) โ Mira Road โ Bhayandar | Partly open | Rest of the line around Dec 2026 |
| Line 12 (Orange) | Kalyan APMC โ Dombivli โ Amandoot (Kharghar) | Under construction | About 54% done; target 2028 |
| Line 12A (Orange) | Manpada โ Kalyan Phata โ Amandoot | Approved | Approved Oct 2026; about 3.5 years to build |
| Line 8 (Gold) | Mumbai Airport โ Navi Mumbai Airport | Approved | Approved Jan 2025; builder yet to be appointed |
| Line 10 (Green) | Gaimukh โ Mira Road | Planned | Awaiting approvals |
| Line 11 (Green) | Wadala โ CSMT | Planned | Not yet scheduled |
| Line 13 (Purple) | Mira-Bhayandar โ Virar | Planned | Not yet scheduled |
| Line 14 (Magenta) | Vikhroli โ Kanjurmarg โ Badlapur | Planned | Not yet scheduled |
Roads, tunnels & sea links
These projects aim to ease Mumbai’s worst traffic bottlenecks, especially the northโsouth crawl along the western suburbs and the eastโwest crossings over the hills of Sanjay Gandhi National Park.
| Project | What it is | Status | Expected |
|---|---|---|---|
| Coastal Road North | Versova โ Dahisar โ Bhayandar, extending the Mumbai Coastal Road north along the western coast | Under construction | Dec 2028 (Mar 2029 at the latest) |
| Versova โ Bandra Sea Link | About 17 km sea bridge off the western coast, linking to the BandraโWorli Sea Link | Under construction | About 31% done (May 2026); target May 2028 |
| Goregaon โ Mulund Link Road (GMLR) | 12.2 km eastโwest road with twin tunnels under Sanjay Gandhi National Park | Under construction | Flyover about 48%, tunnels about 18% (Mar 2026); target 2028 |
| Thane โ Borivali twin tunnel | 11.8 km tunnels under Sanjay Gandhi National Park from Ghodbunder Road to the Western Express Highway | Under construction | Target 2028; cuts the trip from over an hour to about 15 minutes |
| Orange Gate โ Marine Drive tunnel | About 10 km link, mostly underground, from the Eastern Freeway to the Coastal Road | Under construction | Tunnelling began Dec 2025; target Dec 2028 |
| Sewri โ Worli elevated connector | 4.5 km elevated road linking Atal Setu (MTHL) at Sewri to Worli, near the Coastal Road and BandraโWorli Sea Link | Under construction | Opening pushed to early 2027 |
| Uttan โ Virar Sea Link | 55 km sea route from Uttan (Bhayandar) to Virar, linking with the DelhiโMumbai Expressway | Planned | Alignment being finalised; cost over โน58,000 crore |
Rail projects
More tracks mean more local trains and fewer delays. These are the main rail projects in the Mumbai region, alongside the bullet train. For today’s local train lines and routes, see our Mumbai local train guide.
| Project | What it is | Status | Expected |
|---|---|---|---|
| Mumbai โ Ahmedabad bullet train | 508 km high-speed line; Maharashtra stations at BKC (underground), Thane, Virar and Boisar | Under construction | First section (Surat โ Vapi, Gujarat) targeted for Aug 2027 |
| Kalyan โ Badlapur 3rd & 4th lines | Extra tracks so more local trains can run on the Central line | Under construction | About 52% done (Jul 2026); target 2028 |
| Borivali โ Virar 5th & 6th lines | Extra tracks on the Western line north of Borivali | Under construction | About 30% done (Jul 2026); target 2029 |
| Panvel โ Karjat suburban corridor | 29.6 km new line with stations at Panvel, Chikhale, Poyanje, Chouk and Karjat | Under construction | Bridges and tunnel digging complete; opening date not yet announced |
Airport & housing
| Project | What it is | Status | Latest |
|---|---|---|---|
| Navi Mumbai International Airport | Mumbai’s second airport at Ulwe, Navi Mumbai | Open | Flights since 25 Dec 2025; a larger second terminal is being planned |
| Dharavi redevelopment | Rebuilding of Dharavi with new homes for eligible residents | Under construction | First 10,000 rehab homes promised within about 18 months (Jul 2026) |
Which projects help my area?
If you live or are planning to buy or rent in one of these areas, these are the projects to watch.
| Area | Projects nearby |
|---|---|
| Western suburbs (Andheri โ Dahisar โ Bhayandar) | Coastal Road North, Versova โ Bandra Sea Link, GMLR, Thane โ Borivali tunnel, Line 9, Line 7A, Borivali โ Virar rail lines |
| Thane & Ghodbunder Road | Line 4 & Line 4A, Line 5, Thane โ Borivali tunnel, bullet train (Thane station) |
| Kalyan, Dombivli & Badlapur | Line 5, Line 12, Line 12A, Kalyan โ Badlapur 3rd & 4th lines |
| Navi Mumbai & Panvel | Navi Mumbai Airport, Line 12 and Line 12A (at Amandoot), Line 8, Panvel โ Karjat corridor |
| Central suburbs (Ghatkopar, Vikhroli, Chembur) | Line 4, Line 6, Line 2B, GMLR (Mulund end) |
| South Mumbai, Worli & BKC | Sewri โ Worli connector, Orange Gate โ Marine Drive tunnel, Line 2B, bullet train (BKC) |
What opens when
- Late 2026Metro Line 4/Line 4A (Gaimukh โ Cadbury Junction), rest of Line 9 and Phase 1 of Line 5 are all targeted around December.
- 2027Sewri โ Worli connector, Metro Line 7A and the first stretches of Line 6; the first bullet train section opens in Gujarat.
- 2028Big year for roads: GMLR, Thane โ Borivali tunnel, Orange Gate โ Marine Drive tunnel, Versova โ Bandra Sea Link and Coastal Road North; also Line 12, the full Line 2B and Line 4, and the Kalyan โ Badlapur rail lines.
- 2029 and laterBorivali โ Virar 5th & 6th lines, Line 12A, Line 8 and the planned metro lines 10, 11, 13 and 14.
Big projects in Mumbai often run late, so treat these as current targets, not promises. We update them as soon as new dates are announced.
Recently opened
- Mumbai Trans Harbour Link (Atal Setu), Sewri โ Nhava Sheva, opened in January 2024.
- Mumbai Coastal Road (south), Marine Drive โ Worli, fully opened in stages through 2024โ25.
- Metro Line 3 (Aqua), Cuffe Parade โ BKC โ Aarey, fully open since October 2025.
- Navi Mumbai International Airport, commercial flights from 25 December 2025.
- Mumbai โ Pune Expressway “missing link” near Lonavala (13.3 km), opened on 1 May 2026, saving about 20โ30 minutes.
Frequently asked questions
Which big infrastructure projects are coming up in Mumbai?
The main ones are new metro lines (2B, 4, 4A, 5, 6, 7A, 9, 12 and 12A), the Coastal Road extension to Dahisar and Bhayandar, the Versova โ Bandra Sea Link, the Goregaon โ Mulund Link Road, the Thane โ Borivali tunnel, the Orange Gate โ Marine Drive tunnel, the Sewri โ Worli connector and the Mumbai โ Ahmedabad bullet train.
Which projects will open next?
Several metro sections are targeted for late 2026: Line 4 and 4A between Gaimukh and Cadbury Junction in Thane, the rest of Line 9 to Bhayandar, and Phase 1 of Line 5 from Thane to Bhiwandi. The Sewri โ Worli connector is expected in early 2027.
When will the Thane โ Borivali tunnel open?
It is targeted for 2028. The 11.8 km twin tunnels will run under Sanjay Gandhi National Park and cut the Thane โ Borivali drive from over an hour to about 15 minutes.
When will the Coastal Road reach Dahisar and Bhayandar?
The northern extension from Versova to Dahisar and Bhayandar is targeted for December 2028, with March 2029 as the latest date.
When will the bullet train reach Mumbai?
The first section, between Surat and Vapi in Gujarat, is targeted for August 2027. The Mumbai end, with an underground station at BKC, will open later; no date has been announced yet.
Is Navi Mumbai Airport open?
Yes. Navi Mumbai International Airport started commercial flights on 25 December 2025. A larger second terminal for international flights is being planned.
Which areas will benefit the most?
The western suburbs gain the most road projects (Coastal Road North, the sea link, GMLR and the Thane โ Borivali tunnel), while Thane, Kalyan โ Dombivli and Navi Mumbai gain several new metro lines.
How often is this page updated?
We review it whenever an important project reaches a milestone, and at least once a month. Dates are official targets and often move, so check the “last checked” date at the top.
Sources: Construction World โ Coastal Road (Aug 2026) ยท Construction World โ VersovaโBandra Sea Link (Jul 2026) ยท Swarajya โ GMLR (Mar 2026) ยท ThePrint โ Orange Gate tunnel & ThaneโBorivali tunnel ยท PropNewsTime โ SewriโWorli connector (Jul 2026) ยท Free Press Journal โ UttanโVirar Sea Link (Jul 2026) ยท India TV โ bullet train (Aug 2026) ยท Free Press Journal โ rail lines (Aug 2026) ยท Wikipedia โ PanvelโKarjat corridor ยท AIR News โ Navi Mumbai Airport ยท Business Today โ Dharavi (Jul 2026) ยท AIR News โ MumbaiโPune missing link