The MBTA has canceled plans to close the Red Line north of Harvard Square this weekend.
The T announced several weeks ago that buses would replace trains at Porter, Davis and Alewife stations on Saturday, Dec. 8 and Sunday, Dec. 9 so that construction could be done.
The work has been scheduled to be done in the spring instead, because the T needs to shift personnel and resources to another project on the Orange Line, agency spokesman Joe Pesaturo said.
This weekend would have been the fourth straight and final weekend in which the stations were closed as part of a continuation of a $34 million, multi-year project to remove and replace corroded concrete slabs along the tracks, T officials have told the Globe.
The project began last fall along the same stretch of track forcing similar diversions on weekends for four months.
The weekend station closures are needed because the work cannot be done overnight while the subway is not running, the T has said.
The three stations, which have about 21,000 passenger boardings on a typical Saturday, and about 14,000 boardings on Sundays, were closed with service rerouted to buses on the weekends of Dec. 1 to 2, Nov. 24 to 25, and Nov. 17 to 18.