The MTA rolled out its first “open gangway” subway train on the G line Tuesday, with more expected to enter service in the coming months, according to the transit agency.

Open gangway style describes the MTA’s newest set of train cars. On Tuesday, the state-run transportation agency debuted its = open gangway train on the G line at the Church Avenue station in Brooklyn — marking a significant milestone in the modernization of the subway system.

The MTA unveiled its newest train cars on the G line Tuesday, introducing a five-car fleet with an open-gangway design at Church Avenue station in Brooklyn.

The MTA debuted its open gangway R211T subway cars on the G line at the Church Avenue station in Brooklyn, in service between Kensington and Long Island City.