Overview
- Branded as 'Paatal Lok', the underground road network is intended to raise average speeds toward 80 km/h and function as a parallel system to existing arterials.
- The plan is paired with an expanded coastal road from south Mumbai to Bhayandar to provide a barrier-free alternative to the Western Express Highway, which carries roughly 60% of city traffic.
- Projects cited as under construction include the Thane–Borivali and Mulund–Goregaon tunnels to strengthen east–west connectivity.
- From the Bandra Sea Link, new tunnels are proposed to Bandra Kurla Complex and directly to the domestic airport, with the CM claiming a 20-minute trip from south Mumbai to the airport.
- Near-term links include a Borivali–Goregaon parallel road and the Worli–Shivdi connector expected next year, and a tunnel connecting Atal Setu to Girgaon Chowpatty via the Eastern Express Highway targeted in three years, alongside a Mumbai One app for unified Metro–suburban–BEST tickets, no second-class fare hike, and close-door, progressively air-conditioned suburban trains.