Delhi Metro Grey Line opens; BEML to supply 80 railcars for Delhi Metro, India October 4, 2019 | Asia Pacific News Passenger services have commenced on the Delhi Metro Grey Line. The line spans 4.3 km (2.6 km elevated, 1.5 km underground) and covers three stations, including one interchange station. With the openi... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password