The Brihanmumbai Municipal Corporation has proposed an underground subway linking Mahalaxmi, Metro three and the Coastal Road at an estimated cost of Rs 7,020 million (mn). The project is intended to create a direct subterranean pedestrian and commuter link between key transport nodes. The proposal was prepared by the civic engineering department and submitted to the municipal commissioner for consideration. It outlines alignment, station locations and basic construction parameters. The new subway would interconnect the Mahalaxmi area with the Metro three corridor and the Coastal Road, providing integrated transfers for commuters and visitors. The civic plans indicate that entry and exit points will be coordinated with existing transport infrastructure to facilitate smooth interchange. The design envisages fully enclosed passageways, lighting and drainage to ensure year round usability. The scheme also addresses accessibility for users with reduced mobility. Funding for the work has been estimated at Rs 7,020 mn and would be allocated from municipal capital budgets and possible central or state schemes, according to the submission. The civic body described the investment as a strategic step to enhance urban mobility around a congested precinct that hosts sporting, residential and commercial activity. The document sets out preliminary cost components including civil works, utility relocation and systems for ventilation and safety. Officials noted that construction would be undertaken with measures to minimise disruption on surface traffic and coastal road operations while ensuring worker safety and environmental safeguards. The planning documents include phased construction and traffic management plans to maintain access to key road links during works. The proposal highlights coordination with Metro authorities and coastal road management to integrate operational timetables and maintenance regimes. The proposal will be considered by municipal committees before detailed design, tendering and procurement stages proceed, with the civic engineering department overseeing next steps. The submission includes an estimate of project benefits in terms of connectivity, reduced transfer times and improved pedestrian experience. The civic body stated that further technical studies and site investigations will inform final specifications and tender documents.