The trial runs for Mumbai Metro's 2A (DN Nagar-Dahisar) and 7 (Dahisar East-Andheri East) lines will commence from January 14, 2021. "We'll receive the first set of trains in December 2020. Post which, system integration will take about five months. We can assure citizens that (commercial) operations will start from May 2021," MMRDA Commissioner RA Rajeev said.