About
Mumbai Metro Line 4 (Green Line) is one of MMRDA's largest single-line metro projects under construction — a 32.32 km elevated corridor from Wadala (south Mumbai) to Kasarwadavali in Thane city, providing the first metro link extending into Thane (Mumbai's neighbouring city of 2 million population).
MMRDA is executing the project at ₹14,549 crore between 2018 and 2026 in 9 packages, with L&T, Tata Projects, NCC, and Reliance Infrastructure sharing the work. The line uses BEML 6-coach trainsets running on 25 kV AC.
The alignment runs along the Eastern Express Highway median for most of its length, with elevated stations at major nodes including Bhandup, Mulund, and Thane Sahar. A 4 km extension to Kasheli (Thane West) is sanctioned as Phase 2.
Line 4 connects to: Line 6 at Bhandup, Line 7 at Sion, and the planned Line 5 + 11. When operational, it extends Mumbai's metro reach into Thane for the first time, enabling integrated metro travel from Thane to south Mumbai's BKC + Cuffe Parade via Line 3.
Cross-references
9Indian Standards, IRC codes, and InfraLens knowledge articles that bear on this project's design and execution. Each link opens the relevant reference page.
Related calculators
5InfraLens calculators most relevant for metro projects.
Notable features
- Mumbai's first metro line extending into Thane city
- 32.32 km elevated viaduct along Eastern Express Highway median
- Connects to Lines 3, 6, 7 + planned Lines 5, 11
- BEML 6-coach trainsets, 25 kV AC overhead
- Phase 2 Kasheli extension sanctioned for future build