This station opened on February 1, 1917, along with the rest of the Astoria Line, which was originally part of the
IRT, as a spur off the
IRT Queensboro Line, which is now the
IRT Flushing Line. Trains ran between
Grand Central and
Astoria. On July 23, 1917, the
Queensboro Bridge spur of the elevated
IRT Second Avenue Line opened. At that time, all elevated trains to
Queensboro Plaza used the Astoria Line while all subway trains used the IRT Flushing Line, though this was later changed with trains alternating between branches. This station started to be served by
BMT shuttles using elevated cars on April 8, 1923. 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.
Station renovations The platforms at this station, along with six others on the Astoria Line, were lengthened to to accommodate ten-car trains in 1950. The project cost $863,000. Signals on the line had to be modified to take the platform extensions into account. Under the 2015–2019
MTA Capital Plan, the station underwent a complete overhaul as part of the
Enhanced Station Initiative and was entirely closed for several months. Updates included cellular service, Wi-Fi, USB charging stations, interactive service advisories and maps. The award for Package 2 of the renovations, which covered renovations at the
30th Avenue, Broadway,
36th Avenue, and
39th Avenue stations, was awarded on April 14, 2017, to
Skanska USA. The Broadway and 39th Avenue stations were closed entirely on July 2, 2018, and reopened on January 24, 2019, slightly earlier than expected. A previously demolished entrance to the northeast corner of Broadway and 31st Street was added once again to improve access. In 2019, the MTA announced that this station would become
ADA-accessible as part of the agency's 2020–2024 Capital Program. A request for proposals was put out on May 18, 2023 for the contract for a project bundle to make 13 stations accessible, including Broadway. A contract for two elevators at the station was awarded in December 2023. ==Station layout==