138th Street was a station on the demolished IRT Third Avenue Line

IRT Third Avenue Line

The IRT Third Avenue Line, commonly known as the Third Avenue El, was an elevated railway in Manhattan and the Bronx, New York City. Originally operated by an independent railway company, it was acquired by the Interborough Rapid Transit Company and eventually became part of the New York subway...

. It had two tracks and one island platform

Island platform

An island platform is a station layout arrangement where a single platform is positioned between two tracks within a railway station, tram stop or transitway interchange...

. It was also served by trains of the IRT Second Avenue Line

IRT Second Avenue Line

The IRT Second Avenue Line, also known as the Second Avenue El, was an elevated railway in Manhattan, New York City, United States, operated by the Interborough Rapid Transit Company until city takeover in 1940...

 until June 11, 1940. A paid transfer was available to IRT Pelham Line

IRT Pelham Line

The IRT Pelham Line is a rapid transit line on the New York City Subway, served by the 6 and <6> trains. It was built as part of the Dual Contracts expansion and opened in 1919. It is both elevated and underground, with Whitlock Avenue being the first elevated station...

 trains at the underground Third Avenue – 138th Street station. The next stop to the north was 143rd Street

143rd Street (IRT Third Avenue Line)

143rd Street was a station on the demolished IRT Third Avenue Line. This station was also served by trains of the IRT Second Avenue Line until June 11, 1940. The station was originally opened on May 23, 1886. It had two tracks and one island platform. The next stop to the north was either 149th...

. The next stop to the south was 133rd Street

133rd Street (IRT Third Avenue Line)

133rd Street was a station on the IRT Third Avenue Line. It was the first stop in the Bronx after crossing the Harlem River. It had two tracks and one island platform. It was served by trains of both the Third Avenue Line and IRT Second Avenue Line until June 11, 1940. The next stop to the north...

. It closed on May 12, 1955.