Shuttle buses will run on the Ashmont and Braintree branches of the Red Line, up to JFK/UMass Station as the MBTA works to repair tracks. Signal and power upgrades are also in the mix, according to the T's website.

The repairs run between Dec. 3 and Dec. 4, with the two branches reopening for the workweek on Monday.

Related: Citing ‘critical structural finding,’ MBTA closes Columbia Rd. entrance to JFK/UMass station