Prospect Avenue station (IRT White Plains Road Line)

The initial segment of the IRT White Plains Road Line opened on November 26, 1904 between 180th Street–Bronx Park and Jackson Avenue. Initially, trains on the line were served by elevated trains from the IRT Second Avenue Line and the IRT Third Avenue Line. Once the connection to the IRT Lenox Avenue Line opened on July 10, 1905, trains from the newly opened IRT subway ran via the line.[4][5][6]

In 1909, to address overcrowding, the New York Public Service Commission proposed lengthening platforms at stations along the original IRT subway.[7]^:168 On January 18, 1910, a modification was made to Contracts 1 and 2 to lengthen station platforms to accommodate ten-car express and six-car local trains. In addition to $1.5 million (equivalent to $41.2 million in 2019) spent on platform lengthening, $500,000 (equivalent to $13,719,643 in 2019) was spent on building additional entrances and exits. It was anticipated that these improvements would increase capacity by 25 percent.[8]^:15 The northbound platform at the Prospect Avenue station was extended about 80 feet (24 m) to the front and 50 feet (15 m) to the rear,[8]^:114 while the southbound platform was not lengthened.[8]^:106 On January 23, 1911, ten-car express trains began running on the White Plains Road Line.[7]^:168[9]

The New York State Transit Commission announced plans to extend the southbound platforms at seven stations on the line from Jackson Avenue to 177th Street to accommodate ten-car trains for $81,900 on August 8, 1934. The platform at Prospect Avenue would be lengthened from 349 feet (106 m) to 496 feet (151 m).[10]

The Bergen Avenue cutoff, which allowed Third Avenue trains to access the White Plains Road Line, was abandoned on November 5, 1946, as part of the gradual curtailment of elevated service on the IRT Third Avenue Line.[5] On June 13, 1949, the platform extensions at this station, as well as those on White Plains Road Line stations between Jackson Avenue and 177th Street, opened. The platforms were lengthened to 514 feet (157 m) to allow full ten-car express trains to open their doors. Previously the stations could only accommodate six-car local trains.[11]

This station was listed on the National Register of Historic Places on September 17, 2004.[3] It was renovated in 2006.

This station is very close to street level. As a result, the stations houses are adjacent to their respective platforms and there are no crossovers or crossunders.

On the Manhattan-bound side, one staircase from the northwest corner of Westchester Avenue and 160th Street goes up to the north side of the station house. Another from the northern intersection of Prospect Avenue and 160th Street goes up to the south side. Inside the station house, there is a token booth, turnstile bank, waiting area, and doors leading to the platform. The platform has two exit-only turnstiles, each of which leads to one of the street stairs.[14]

On the northbound side, two staircases from the northeast corner of Longwood and Westchester Avenues go up to the north side of the station house, which has a now closed customer assistance booth, turnstile bank, waiting area, and doors leading directly to the platform. A high exit-only turnstile from the platform leads directly to the staircases. Towards the south end of the platform, another exit-only turnstile leads to a double-flight staircase going down to the northeast corner of Prospect and Westchester Avenue.[14] Both station houses have heaters.