to the signal modernization project on the line. The north end of the line is a simple two-track stub just below the Bronx County line, which is used to store trains, with crossover tracks south of Dyre Avenue terminal. The south end is a flying junction (the Dyre Avenue Flyover), into the local tracks of the IRT White Plains Road Line (with crossovers to the express track). History Background The Dyre Avenue Line was originally part of the four-track main line of the New York, Westchester and Boston Railway, an electrified commuter line that connected White Plains and Port Chester, New York to a station at the Harlem River adjacent to the IRT Third Avenue Line. The NYW&B opened on May 29, 1912. Soon a transfer station opened at East 180th Street, with transfers to the IRT White Plains Road Line and various surface lines. Express trains stopped within the Bronx only at Pelham Parkway and East 180th Street. The NYW&B was abandoned on December 31, 1937 due to bankruptcy. Plans were made for a parallel subway line even before the NYW&B's abandonment; a 1929 expansion plan included a line along Morris Park Avenue, Wilson Avenue and Boston Road to Baychester Avenue, fed by the IND Second Avenue Line. When the IND Concourse Line was being built, the City, as part of the 1929 expansion plan, planned the line to be extended further east via Burke Avenue and Boston Road to Baychester Avenue. However, due to the Great Depression, money for the line ran out, and as a result the integration of the NYW&B line was seen as a cheaper way to serve the Northeast Bronx. In 1939, after abandonment, the plan was to integrate the former NYW&B to Dyre Avenue into the IRT system branching off the IRT Pelham Line as the Westchester and Boston Line. It was later decided to only utilize the line north of the East 180th Street station, even though the line continued to the Harlem River Terminal paralleling the New Haven Railroad (NHRR) right-of-way. However, a track connection to the NHRR was built in 1955 for equipment and material transfer and interchanges, including new car deliveries. The R17s were delivered via this connection in 1955, and the R33/R36s were delivered via the connection in February 1964. Acquisition The New York City Board of Transportation (BOT) bought the NYW&B within the Bronx north of East