 Unused in regular service, the middle and tail tracks were originally intended for an unbuilt extension proposed in the IND Second System.Not part of the first official plan in 1929, it was proposed by the city Board of Transportation on October 12, 1930 as an addition to the original plans.The plan was for a line to continue east along Lafayette Avenue to Broadway (at Kosciuszko Street of the BMT Jamaica Line), then northeast along Stanhope Street to a junction with the BMT Myrtle Avenue Line and a planned IND Myrtle-Central Avenues Line along Myrtle Avenue (between the Central Avenue and Knickerbocker Avenue stations).