Mumbai Infra Update: Metro 4 Pit Line Clears CMRS Inspection; MMRDA Awaits Safety Report Ahead Of Diwali Launch
Mumbai, August 22, 2026: The Mumbai Metropolitan Region Development Authority (MMRDA) has completed another key step towards commencing services on the first phase of Metro 4 in Thane, with the Commissioner of Metro Rail Safety (CMRS) completing its inspection of the pit line on the 10.5-km Gaimukh-Cadbury Junction stretch. The authority is now awaiting the CMRS report, which will determine…
Mumbai's Mumbai Metropolitan Region Development Authority (MMRDA) has completed a critical step in the development of Metro 4, the first phase of the Thane extension. The Commissioner of Metro Rail Safety (CMRS) has completed its inspection of the pit line on the 10.5 km Gaimukh-Cadbury Junction stretch. The MMRDA is now awaiting the CMRS report to determine if any modifications or additional safety measures are required before the project can proceed for final approval.
A senior MMRDA official stated that the inspection, aimed at the routine maintenance of metro rakes, was completed a few days ago. The facility, which will serve until the Metro 4 car shed is finished, provides an interim arrangement for essential maintenance and inspections of metro trains. With the RDSO testing completed in June, the project has moved into the final stage of safety scrutiny.
MMRDA anticipates securing the necessary approvals to commence operations by Diwali or by the end of 2026, pending the outcome of the CMRS report. The first phase of Metro 4, which will cover eight stations from Cadbury Junction to Gaimukh, is expected to offer an alternative public transport option for commuters in Thane, particularly along the congested Ghodbunder Road corridor.
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