The IRT Dyre Avenue Line (formerly the IND Dyre Avenue–East 174th Street Line) is a New York City Subway rapid transit line, part of the A Division. It is a branch of the IRT White Plains Road Line in the northeastern section of the Bronx, north of East 180th Street. As of 2013, it has a daily ridership of 34,802. The line is the only remaining portion of the New York, Westchester and Boston Railway (NYW&B). The NYW&B opened in 1912, providing service from the Harlem River to White Plains and New Rochelle (eventually to Port Chester). Service ended in 1937, and the line within New York City was acquired by the city in 1940, with shuttle service between Dyre Avenue and East 180th Street beginning the following year with IRT elevated cars. Through-service to Manhattan began in 1957, and the stations on the line were upgraded. Extent and service The following services use part or all of the IRT Dyre Avenue Line: It is served by the 5 train, which makes all stops. The line has three tracks for most of its length. A fourth track briefly joins south of Eastchester–Dyre Avenue and between Pelham Parkway and Morris Park. The southbound revenue track is a test track for new A Division trains. The fourth track (a trackbed for most of its length) was extended to test subway automation on the line and was initially used for layup and storage. In the late 1990s, the southbound express track was extended from south of Dyre Avenue and connected to the stub end track at Pelham Parkway. The southbound track at Dyre Avenue is in the position of the southbound express track, as the southbound local track is no longer present. The current platform is built over the northbound express track. Small portions of the original side platforms remain on both sides of Dyre Avenue station. South of Dyre Avenue station, the southbound track moves over to the local position and the southbound express track begins. The northbound express track was used for storage but this use has largely been made redundant by the expansion of Unionport Yard. A small portion of this track also exists between Baychester and Dyre Avenue stations. The portion between Baychester and Dyre Avenue stations is currently in the process of demolition. The other portion has been extended to the northern end of Pelham Parkway in conjunction