Savin Hill station is a rapid transit station in Boston, Massachusetts. It serves the Ashmont branch of the MBTA's Red Line. It is located at 121 Savin Hill Avenue adjacent to Sydney Street in the Savin Hill area of the Dorchester neighborhood. Opened in 1845 as a commuter rail station, Savin Hill was converted to rapid transit in 1927 and rebuilt in 2004–05 for accessibility. Averaging 2,199 daily boardings by a FY 2019 count, Savin Hill is the least-used station on the Red Line. History Old Colony Railroad The Old Colony Railroad opened from Plymouth to South Boston in November 1845. A station was built at Savin Hill, located just north of the modern location. In December 1872, the Old Colony opened its Shawmut Branch to Milton, which added local service to Savin Hill. Around that time, the station was moved to its modern location just south of Savin Hill Avenue. The new station featured a brick building on the west side of the tracks and a wooden building on the east side (the Old Colony had left-hand running until 1895, so the larger brick building was originally on the inbound side). The station was served only by local trains on the outer tracks, while express trains used the inner tracks. Conversion to rapid transit Commuter rail service on the Shawmut Branch ended in September 1926. The Boston Elevated Railway, which had bought the line, began converting it into the Dorchester Extension, a rapid transit extension of the Cambridge-Dorchester Tunnel line. Savin Hill, located on the Old Colony mainline, was rebuilt as a rapid transit station as part of the extension. The commuter rail platforms and station buildings were removed, though a temporary station was used until November 4, 1927. Savin Hill reopened on November 5, 1927 along with Columbia and Fields Corner as part of the first phase of the extension. In 1934, the Boston Elevated Railway requested the addition of a busway on the west side of the station. Construction on the busway and a pedestrian overpass to the platform began in August and finished in December 1934. Fare control was relocated to the platform level; a platform extension to the south was constructed - without interrupting train service - to accommodate this. When the bus routes were diverted away from the station in 1962, the busway was converted to a parking lot. Savin Hill station was further