MUMBAI: The Commissioner of Metro Railway Safety (CMRS) has given the safety clearance for the rolling stock of Metro 4 and 4A, taking the corridors a step closer to opening after the other mandatory safety certifications are secured.The clearance has been issued to the Mumbai Metropolitan Region Development Authority (MMRDA) and Maha Mumbai Metro Operation Corporation Limited (MMMOCL).The two lines could also become the first metro corridor in Mumbai to begin operations without a dedicated car depot, until the planned depot is ready.To service the first phase, six rakes will be deployed to ferry passengers. Gaimukh metro station and the section beyond it will be used for stabling and maintaining the trains.A pit has been created at Gaimukh for this purpose. The station has two island platforms and four lines, with two earmarked for passenger operations and the other two for servicing the rakes.The rakes procured specifically for Metro 4 and 4A, however, are yet to arrive. In the interim, trains currently stationed at the Charkop car depot and being used on Metro 2A, 7 and 9 will be deployed on the new corridor.In February 2025, MMRDA awarded contracts for rolling stock and signalling to Larsen & Toubro (L&T) and Alstom. The companies are to supply 39 driverless six-car trainsets, comprising 234 coaches.These trainsets are yet to be delivered. Once delivered, they will require fresh CMRS certification before being inducted into passenger service.The rakes being considered for the initial operations were manufactured by BEML (Bharat Earth Movers Limited) for Metro 2A, 7 and 9 under the Make in India initiative.The CMRS clearance for their deployment on Metro 4 and 4A was sought on the basis of the earlier clearance granted to the BEML rakes for operations in Mumbai’s western suburbs.METRO 4 — ENTIRE CORRIDORCorridor: Wadala, Ghatkopar, Kasarvadavali, GaimukhTotal length: 35.2 kmMetro 4: Wadala, Ghatkopar, Kasarvadavali, 32.32 kmMetro 4A: Kasarvadavali, Gaimukh, 2.88 kmPHASE I — GAIMUKH–CADBURY JUNCTIONLength: 10.5 kmStations: 10Stations: Cadbury Junction, Majiwada, Kapurbawdi, Manpada, Tikuji-ni-wadi, Dongripada, Vijay Garden, Kasarvadavali, Govaniwada, GaimukhTrial runs: Flagged off on September 22, 2025Initial trial section: Gaimukh, Govaniwada, Kasarvadavali, Vijay GardenDEPOT & OPERATIONSDepot: Mogharpada, along Ghodbunder Road, ThaneInterim arrangement: Gaimukh will facilitate initial operations and rake servicing until the Mogharpada depot is ready.
