Early history The
Fulton Street subway was the city-owned Independent System (IND)'s main line from
Downtown Brooklyn to southern Queens. The construction of the line required multiple high-voltage
transmission lines to be rerouted under Atlantic Avenue. Due to the presence of many gas mains, telephone lines, sewers, fire alarm wires, and telegraph connections, digging of the subway line had to be done by hand shovels. In October 1930, the roof of the subway tunnel was completed to Vanderbilt Avenue, and the roadbed was ready for the installation of tracks. The New York City Board of Transportation required four months to pass following the replacement of dirt in excavations before permanent pavement could be installed to allow the soil to settle. The line was opened from Jay Street to
Rockaway Avenue on April 9, 1936, including the stub terminal at
Court Street. To allow the subway line to be built, the following streets were widened from : Jay Street between Nassau Street to Fulton Street, Smith Street between Fulton Street and Atlantic Avenue, and Schermerhorn Street between Smith Street and Nevins Street. The land acquired to widen the streets was valued at $1.75 million.
Late 1930s and 1940s Further construction was delayed by funding problems due to the
Great Depression in the 1930s. The progress lasted only a few years, as all work on the last portions in Brooklyn was stopped by December 1942 shortly after the United States entered
World War II, with
Broadway−East New York complete but not in operation due to lack of signal equipment, and the remaining stations to Euclid Avenue as unfinished shells. The Court Street station was closed on June 1, 1946, due to low ridership and because of its close proximity to the
Hoyt–Schermerhorn Streets station. After World War II ended, workers and materials became available for public use again. The badly needed extension to the more efficient terminal at Broadway−
East New York (the current
Broadway Junction station) opened on December 30, 1946. Because these stations were completed later than the rest of the line, they received different design features than other IND stations, including different wall tiles and
fluorescent lighting. The Fulton Street express tracks were not used in regular service until October 24, 1949. A trains began running express during rush hours to
Broadway–East New York, with trains extended to provide local service. The express reduced travel time by five minutes.
1950s to 1990s In 1953, the platforms were lengthened at
Ralph Avenue and
Broadway–East New York to to allow E trains to run eleven car trains. The began running eleven car trains during rush hours on September 8, 1953. The extra train car increased the total carrying capacity by 4,000 passengers. The lengthening project cost $400,000. In late 1952, the
Board of Transportation began construction on a connection between the IND and both the Fulton El and the
Rockaway Beach Branch of the
Long Island Rail Road, which included a new underground station at
Grant Avenue. The connection from the 80th Street elevated station to the rest of the BMT Fulton Elevated was severed on April 26, 1956, and the IND was extended east (track direction south) from
Euclid Avenue via the intermediate station at Grant Avenue, and a connecting ramp (known as the Grant Avenue ramp). The new service to Lefferts Boulevard began three days later. On June 28, 1956, the connection to the
IND Rockaway Line east of
Rockaway Boulevard was opened.
2000s to present The 2015–2019
Metropolitan Transportation Authority (MTA) Capital Plan called for the Fulton Street Line's
Clinton–Washington Avenues,
Kingston–Throop Avenues, and
Van Siclen Avenue stations, along with 30 others, to undergo a complete overhaul as part of the
Enhanced Station Initiative. Updates would include cellular service, Wi-Fi, USB charging stations, interactive service advisories and maps, improved signage, and improved station lighting. However, in April 2018, it was announced that cost overruns had forced the MTA to reduce the number of subway stations included in the program from 33 stations to 20. The stations to be renovated along the IND Fulton Street Line were among the 13 stations without funding, which will be pushed back to the 2020–2024 Capital Plan. As part of a program to upgrade the
signaling of the New York City Subway, the MTA's 2020–2024 Capital Program calls for adding
communications-based train control (CBTC) to several more lines, including the IND Fulton Street Line west of the
Euclid Avenue station. The CBTC signaling system would replace the line's existing signal system, which has not been upgraded since the line originally opened in the 1930s and 1940s. On November 9, 2022, the MTA put out the request for proposals for the design-build contract to install CBTC on the Fulton Street Line between High Street and Euclid Avenue. CBTC installation on the rest of the Fulton Street Line from Euclid Avenue to
Ozone Park–Lefferts Boulevard was proposed as part of the MTA's 2025–2029 Capital Program. In December 2025, L.K. Comstock received a $1.3 billion contract to install CBTC on both sections of the Fulton Street Line; the installation was to be funded using revenue from
congestion pricing in New York City. ==Second System planned route==