Chief Minister Uddhav Thackeray will flag off trial runs for the city’s two new metro rail lines on the Charkop-Dahisar-Aarey route of Metro 2A and 7, starting May 31. These two lines will be fully operational from January 2022, with the first phase of Metro-2A (Dahisar-Aarey) and Metro-7 (Dahanukarwadi to Aarey) commencing from October.