The Main Line Elevated opened between and on June 10, 1901. The Main Line used the outer tracks of the Tremont Street subway (the Pleasant Street incline tracks) and provided a significantly faster route to downtown that surface streetcars, prompting a rearrangement of the streetcar network. Jamaica Plain service was rerouted to the Dudley Square transfer station; a new Dudley–Brookline route was introduced soon after. Tracks on South Street between Jamaica Plain and Forest Hills Square (and the adjacent Forest Hills Yard) were approved by the city in June 1900. Construction did not begin until April 1902, and the connector opened on May 17. The Boston Elevated Railway opened tracks on the newly-laid-out South Huntington Avenue between Centre Street and Huntington Avenue on May 11, 1903, and began running Jamaica Plain–Park Street service via South, Centre, South Huntington, and Huntington.