One train line on the MBTA will see significant service delays over the weekend, plus there is a service change planned for Martin Luther King Jr. Day.

The Red Line will have shuttle bus service between Kendall/MIT and Park Street Stations in both direction from the start to finish of the regular service hours on Saturday and Sunday. Shuttles will run between Kendall/MIT, Charles/MGH and Park Street as construction crews work on the Longfellow Bridge Project. 

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The Green, Blue and Orange lines will run without any planned interruptions. 

Each train and bus line will run on Saturday schedules, except for the Silver Line, which will run on a weekday schedule, on Monday, Martin Luther King Jr. Day. 

The Commuter Rail and the boats will run on a normal weekday schedule.