The city government took over the BMT's operations on June 1, 1940, and the IRT's operations on June 12, 1940. On October 17, 1949, the Astoria Line became BMT-only as the tracks at Queensboro Plaza were consolidated and the platforms on the Astoria Line were shaved back to allow BMT trains to operate on it. Service was initially provided by the Brighton Local (BMT 1) and the Broadway–Fourth Avenue Local (BMT 2) at all times.
