Tunnelling works of Chennai Metro Corridor 5 begin, DPR submitted for Phase 1 Extension, India February 19, 2025 | Asia Pacific News, News The tunnelling works of Corridor 5 of Chennai Metro have commenced. Tata Projects is one of the contractors for the tunnelling works. Corridor 5 will span 47 km (including 3.9 km underground) and cove... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password