Delhi Metro Heritage Line opens; NITI Aayog approves two stretches of Phase III, India May 28, 2017 | Asia Pacific News Delhi Metro Rail Corporation (DMRC) has commenced passenger services on Heritage Line (ITO – Kashmere Gate section) of Delhi Metro Phase III. The line spans 5.17 km (completely underground) from... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password