RVNL begins tunnelling works of Kolkata Metro Orange Line, India May 16, 2024 | Asia Pacific Company News, Asia Pacific News, Company News, News Rail Vikas Nigam Limited (RVNL) has commenced tunnelling works of the Orange Line of the Kolkata Metro network. The Orange Line will span 29 km (500 metres underground) and cover 24 stations. Currentl... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password