1001 Smart Cities
🇮🇳 Mumbai

Mumbai Metro Aqua Line (Line 3) — Automated Underground Corridor

🤖 AI-generated summary · ◆ 13 sourced claims · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

13 sourced claims on this page, none individually verified yet — turn on “Sources in the text” to see each one.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

✎ Corrected 21 Aug 2026 1 claim added. What changed →

The signalling covers unattended operation, but driverless running waits on six months of trials and regulator clearance. The first 136 days drew under 20,000 riders a day against a 400,000 forecast.

Outcome🔄 Ongoing
Evidence📰 Media
what does this mean?The strongest source is press reporting; no primary evaluation was located. It grades who did the looking — not how well the project went. All four grades →
Run byMumbai Metro Rail Corporation Ltd (MMRC)
Scale🏙️ City-wide

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 6 more in Mumbai · 🚌 Public transport guide · 🚲 Mobility projects

Mumbai's first fully underground metro opened in three phases between October 2024 and October 2025: 33.5 km, 27 stations. Alstom supplied 31 eight-car trains with regenerative braking and a CBTC package covering unattended train operation, platform screen doors and electrical and mechanical SCADA. MMRC said driverless running would start only after six months of trials and safety-regulator clearance. Over its first 136 days the partly opened line carried under 20,000 riders a day against a 400,000 forecast; the depot site at Aarey was stayed in 2019, shifted toward Kanjurmarg, then moved back in 2022.

Live 📅 since 2024

📊 Impact

141,000 average weekday riders in October 2025, the first month with the full 33.5 km corridor open, peaking at 182,000 in a single day (MMRC figures reported by PTI).

🚲 MobilityPublic transportAutonomous vehiclesSafety & security

Sources

↗ Alstom — Mumbai Metro Aqua Line inaugurated for commercial operationSupplier's release confirming the October 2024 commercial opening. Direct fetch returned 403; existence and content confirmed via search.
↗ Railway-News — Alstom starts manufacturing metro trains for MumbaiQuotes the contract scope: 31 trainsets / 248 cars, EUR 452M, customer MMRC, CBTC with unattended train operation, platform screen doors, electrical and mechanical SCADA, regenerative braking.
↗ Metro Rail News — Mumbai metro to launch driverless operations soon (May 2023)MMRC: service trials run with drivers on board; at least six months of trials required for safety-regulator authorisation before converting to driverless mode.
↗ The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in OctoberMMRC figures: 38.63 lakh riders in October 2025, 1.41 lakh average weekday, 1.82 lakh peak day; full line opened 9 October 2025.
↗ Free Press Journal — Mumbai Metro 3 struggles with ridershipMMRC data: 2.66 million riders over 136 days (7 Oct 2024 - 20 Feb 2025), under 20,000/day against a 400,000/day projection for the opened section.
Show 2 more sourcesShow fewer
↗ Free Press Journal — Aqua Line ridership crosses 4 crore markCumulative ridership passed 40 million in April 2026 on the 33.5 km corridor.
↗ Wikipedia — Aqua Line (Mumbai Metro)Background reference for the three phase-opening dates, 27 stations, and the Aarey depot chronology: stay November 2019, alternative-site committee December 2019, construction resumed July 2022.
Show your work What this page rests on and what it can’t tell you · all 13 claims with their sources · the forensic record

Evidence Passport · public beta 13 addressable claims, 7 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 13

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-0901a7015f62d58c descriptive
Mumbai's first fully underground metro
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Both cited sources describe the corridor as fully underground: Wikipedia's lead says "It is the first metro line to be fully underground in Mumbai" (26 of the 27 stations underground, one at grade), and the Free Press Journal calls it "Mumbai's first fully underground metro line".
Caveat
Both sources say Mumbai's first, not India's; the entry has been corrected to match them.

Sources carrying this claim

  1. Wikipedia — Aqua Line (Mumbai Metro)
  2. Free Press Journal — Aqua Line ridership crosses 4 crore mark
Claim 2 clm-1bf37ccfb7ca9ce9 quantitative
opened in three phases between October 2024 and October 2025
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Wikipedia dates all three openings: the first phase (BKC to Aarey Jogeshwari-Vikhroli Link Road, 10 stations) was inaugurated on 5 October 2024, Phase 2A (BKC to Acharya Atre Chowk, five more stations) on 9 May 2025, and the final 10.99 km stretch to Cuffe Parade on 8 October 2025.
Caveat
These are inauguration dates. The Free Press Journal dates the start of public service on the first section to 7 October 2024, and The Week/PTI says the full line was thrown open from 9 October 2025 — each a day or two after the ceremony.

Sources carrying this claim

  1. Wikipedia — Aqua Line (Mumbai Metro)
Claim 3 clm-7b3ce9e98d3b4fd5 quantitative
33.5 km, 27 stations
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Wikipedia: "The 33.5 km (20.82 mi) route is Mumbai Metro's first underground line with 27 stations, 26 of which are underground stations and one is at-grade." The Week/PTI independently gives the length, describing "the 33.5-km line, running between Cuffe Parade station in south Mumbai and Aarey JVLR station in the western suburbs".
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Wikipedia — Aqua Line (Mumbai Metro)
  2. The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in October
Claim 4 clm-639a6ba5cf03441a quantitative
Alstom supplied 31 eight-car trains with regenerative braking
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Railway-News reports the MMRC rolling-stock contract as 31 metro trains of eight cars each — 248 cars in total, worth EUR 452 million — and states that the trains are equipped with a regenerative braking system. Neither page could be retrieved: railway-news.com answered HTTP 502 on three attempts and alstom.com answered HTTP 403, so the wording was confirmed through search results rather than the page itself and no locator string could be copied from the source.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Railway-News — Alstom starts manufacturing metro trains for Mumbai
  2. Alstom — Mumbai Metro Aqua Line inaugurated for commercial operation
Claim 5 clm-400b3909907262ba descriptive
a CBTC package covering unattended train operation, platform screen doors and electrical and mechanical SCADA
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Railway-News describes the signalling scope as Alstom's Urbalis 400 CBTC covering unattended train operation (UTO), computer-based interlocking and centralised train supervision, and states that the scope also includes platform screen doors as well as the electrical and mechanical supervisory control and data acquisition system (E&M SCADA). Both pages blocked automated retrieval (HTTP 502 and HTTP 403), so no locator string could be copied from the source.
Caveat
The source lists platform screen doors as contract scope without stating that all 27 stations have them.

Sources carrying this claim

  1. Railway-News — Alstom starts manufacturing metro trains for Mumbai
  2. Alstom — Mumbai Metro Aqua Line inaugurated for commercial operation
Claim 6 clm-13e2d2c07d803169 descriptive
MMRC said driverless running would start only after six months of trials and safety-regulator clearance
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
MMRC is quoted saying service trials "will also be conducted with drivers on board and submitted for CMRS (Commissioner for Metro Rail Safety) approval", that "Trials of at least six months would require of the CMRS authorisation to conduct driverless operations", and "We will convert to driverless mode once the CMRS approval is received". The report names the CMRS as the final approval authority for the commercial operation of any metro line in the country.
Caveat
The statement dates from May 2023 and refers to the Commissioner for Metro Rail Safety. Neither this source nor the entry says whether that clearance has since been granted.

Sources carrying this claim

  1. Metro Rail News — Mumbai metro to launch driverless operations soon (May 2023)
Claim 7 clm-bbe6e9002aec9acb quantitative
Over its first 136 days the partly opened line carried under 20,000 riders a day
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Free Press Journal reports MMRC data for 7 October 2024 to 20 February 2025: "Over 136 days, the 12.44 km stretch between Aarey and BKC recorded 29,162 trips", carrying 2.66 million riders and "averaging fewer than 20,000 passengers per day" — an average of 91 passengers per trip, or 46 per service.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Free Press Journal — Mumbai Metro 3 struggles with ridership
Claim 8 clm-1d0cd7bf0c509d92 quantitative
against a 400,000 forecast
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same report sets the observed use against a "projected daily ridership of 400,000", written in that numeral form rather than as a lakh figure.
Caveat
The report does not say whether the 400,000 projection was made for the 12.44 km section that was open during those 136 days or for the full 33.5 km corridor.

Sources carrying this claim

  1. Free Press Journal — Mumbai Metro 3 struggles with ridership
Claim 9 clm-abc9e29ade0d5c03 quantitative
the depot site at Aarey was stayed in 2019, shifted toward Kanjurmarg, then moved back in 2022
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Wikipedia's account: in November 2019 the Supreme Court stayed the tree-felling and the incoming chief minister halted car shed work; a committee then examined Kanjurmarg as an alternative site; in July 2022, under the Shinde-Fadnavis government, "the stay order for the construction was retracted" and work resumed at Aarey, Kanjurmarg having been judged not viable over distance and ownership disputes.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Wikipedia — Aqua Line (Mumbai Metro)
Claim 10 clm-b2c287ec5903a007 quantitative
141,000 average weekday riders in October 2025
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Week carries the PTI wire report: "The spokesperson said the average weekday ridership of the Aqua Line stood at 1.41 lakh" for October 2025 — 1.41 lakh being 141,000.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in October
Claim 11 clm-fa15b13e4a7a35b5 quantitative
the first month with the full 33.5 km corridor open
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Week/PTI counts the October footfall "from October 9, when the line was thrown fully open after its inauguration by Prime Minister Narendra Modi"; Wikipedia dates that final inauguration, of the 10.99 km stretch to Cuffe Parade, to 8 October 2025. October 2025 is therefore the first calendar month in which the whole 33.5 km was in service.
Caveat
The corridor opened part-way through the month — the two sources differ by a day, 8 or 9 October — so the monthly figures cover about three weeks of full-length running and one week of the shorter line.

Sources carrying this claim

  1. The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in October
  2. Wikipedia — Aqua Line (Mumbai Metro)
Claim 12 clm-9cfa0cf442a76b95 quantitative
peaking at 182,000 in a single day
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Week/PTI: "with the highest single-day ridership touching 1.82 lakh since opening" — 1.82 lakh being 182,000.
Caveat
The source records this as the highest single day since the line opened, not necessarily a day falling within October 2025.

Sources carrying this claim

  1. The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in October
Claim 13 clm-714a7d1e216a3555 descriptive
(MMRC figures reported by PTI)
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The item is a PTI wire report carried by The Week, and it attributes the numbers to the operator: "According to Mumbai Metro Rail Corporation (MMRC), the 33.5-km line ... recorded a footfall of 38.63 lakh commuters last month."
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in October
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-21-unsourced-text-correction effective 2026-07-26 · created 2026-08-21

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:a6b67ea92496f5f576f64c4af03707f63af4489415d97bf7ea40ec7465778963
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
13
of 13 claims mapped
7
source dossiers
0
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Mumbai Metro Rail Corporation Ltd (MMRC)
Actor types
utility
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

7 source dossiers

Alstom — Mumbai Metro Aqua Line inaugurated for commercial operation alstom.com · 2 linked claims

Open original source ↗

Stable source ID
src-f556b4fe0b4ea62b
Publisher
Name not classified · alstom.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Supplier's release confirming the October 2024 commercial opening. Direct fetch returned 403; existence and content confirmed via search.

Descriptive only — not page/paragraph exact
Claims linked
Railway-News — Alstom starts manufacturing metro trains for Mumbai railway-news.com · 2 linked claims

Open original source ↗

Stable source ID
src-200c8fd10253bf51
Publisher
Name not classified · railway-news.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Quotes the contract scope: 31 trainsets / 248 cars, EUR 452M, customer MMRC, CBTC with unattended train operation, platform screen doors, electrical and mechanical SCADA, regenerative braking.

Descriptive only — not page/paragraph exact
Claims linked
Metro Rail News — Mumbai metro to launch driverless operations soon (May 2023) metrorailnews.in · 1 linked claim

Open original source ↗

Stable source ID
src-444bc7fffc927b75
Publisher
Name not classified · metrorailnews.in
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

MMRC: service trials run with drivers on board; at least six months of trials required for safety-regulator authorisation before converting to driverless mode.

Descriptive only — not page/paragraph exact
Claims linked
The Week / PTI — Over 38 lakh commuters used Mumbai Metro Line-3 in October theweek.in · 5 linked claims

Open original source ↗

Stable source ID
src-65de1b5a9adced88
Publisher
Name not classified · theweek.in
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

MMRC figures: 38.63 lakh riders in October 2025, 1.41 lakh average weekday, 1.82 lakh peak day; full line opened 9 October 2025.

Descriptive only — not page/paragraph exact
Claims linked
Free Press Journal — Mumbai Metro 3 struggles with ridership freepressjournal.in · 2 linked claims

Open original source ↗

Stable source ID
src-3a761d7b0ed1ffa1
Publisher
Name not classified · freepressjournal.in
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

MMRC data: 2.66 million riders over 136 days (7 Oct 2024 - 20 Feb 2025), under 20,000/day against a 400,000/day projection for the opened section.

Descriptive only — not page/paragraph exact
Claims linked
Free Press Journal — Aqua Line ridership crosses 4 crore mark freepressjournal.in · 1 linked claim

Open original source ↗

Stable source ID
src-76898176186c384c
Publisher
Name not classified · freepressjournal.in
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Cumulative ridership passed 40 million in April 2026 on the 33.5 km corridor.

Descriptive only — not page/paragraph exact
Claims linked
Wikipedia — Aqua Line (Mumbai Metro) en.wikipedia.org · 5 linked claims

Open original source ↗

Stable source ID
src-d453eb48cbb4b5d7
Publisher
Name not classified · en.wikipedia.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-21
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Background reference for the three phase-opening dates, 27 stations, and the Aarey depot chronology: stay November 2019, alternative-site committee December 2019, construction resumed July 2022.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.

Continue exploring

Compare this project

🇮🇳 Delhi Metro's Driverless Lines: Magenta & Pink · New Delhi India's driverless gap: Delhi's operators only left the cab in 2025; Mumbai's CBTC allows unattended running but drivers stay aboard. 🇨🇳 Yanfang Line: Driverless Metro on Home-Grown Signalling · Beijing Yanfang has run unattended since 2019; Mumbai's Line 3 has the same CBTC capability but keeps drivers until the regulator clears it. 🇮🇳 Mumbai One Integrated Ticketing App · Mumbai Each metro line sold its own tickets until Mumbai One put five of them, this one included, on a single QR ticket in October 2025.

Explore the wider context

🔑 Your Smart City Is Owned by Someone Else📖 CBTC (communications-based train control)📖 Grades of Automation (GoA)📖 Personal rapid transit (PRT)
📎 Cite this project

1001 Smart Cities (2026). “Mumbai Metro Aqua Line (Line 3) — Automated Underground Corridor” — Mumbai, India. The Smart City Atlas. https://1001smartcities.org/projects/mumbai-metro-aqua-line/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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