DMRC to support O&M for Noida-Greater Noida Metro August 1, 2016 | Asia Pacific News The Delhi Metro Rail Corporation (DMRC) will assist the Noida Metro Rail Corporation (NMRC) in operations and maintenance (O&M) of the upcoming Noida-Greater Noida corridor for three years after the s... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password