After the Berkeley Street line was closed around 1930, only Huntington Avenue cars used the Boylston Street Incline. In June 1932, the state legislature authorized the construction of a tunnel from Gainsborough Street under Huntington Avenue, Stuart Street, Columbus Avenue, and the Boston Common to Park Street station. The BERy did not approve the project because the portion east of Copley Square would have duplicated the existing subways at considerable cost, and it would not relieve congestion at the intersection with Massachusetts Avenue; the state act did not allow for any modifications to the route. In July 1933, the state legislature provided conditions for the construction of the subway with more route flexibility. It was approved by the city and the BERy, but not by the state Emergency Finance Board. The Boston Transit Department developed six possible tunnel plans for evaluation. A tunnel as far west as Longwood Avenue or as short as Dartmouth Street was considered, as splitting from the existing subway east of Copley station (with a new station added under Copley Square) or to the west.