Blue Line: Delays of about 15 minutes due to traffic at Bowdoin. Trains may stand by at stations. #mbtaalert #mbta

Blue Line: Delays of about 15 minutes due to a maintenance train inspecting the overhead wires between Airport and Wonderland. Trains may stand by at stations. #mbtaalert #mbta

Red Line: Delays of about 20 minutes due to a medical emergency at Central. #mbtaalert #mbta

Red Line: Delays of about 20 minutes due to a disabled train at JFK/UMass. #mbtaalert #mbta

Green Line: Delays of about 15 minutes due to a signal problem at Copley. Trains may stand by at stations. #mbtaalert #mbta

Orange Line: Delays of about 15 minutes due to a disabled train at Mass Ave. #mbtaalert #mbta

Red Line: Delays of about 20 minutes due to fire department activity at Charles MGH. #mbtaalert #mbta

Green Line: Delays of about 15 minutes due to a signal problem at Copley. Trains may stand by at stations. #mbtaalert #mbta

Orange Line: Delays of about 15 minutes due to a disabled train at Mass Ave. #mbtaalert #mbta

Red Line: Delays of about 10 minutes due to a disabled train at Downtown Crossing. #mbtaalert #mbta

Green Line C Branch: Delays of about 15 minutes due to an earlier disabled train at Fairbanks. #mbtaalert #mbta

Green Line C Branch: Shuttle buses are replacing service between Coolidge Corner and Cleveland Circle due to a disabled train at Fairbanks. #mbtaalert #mbta

Green Line C Branch: Delays of about 15 minutes due to a disabled train at Fairbanks. Trains may stand by at stations. #mbtaalert #mbta

Due to construction, the staircase at the north end of the Savin Hill platform is out of service. Riders should follow station personnel and signage to the alternate staircase located in the center of the platform. #mbtaalert #mbta

Blue Line: Delays of about 15 minutes due to accommodating a passenger at Aquarium. Trains may stand by at stations. #mbtaalert #mbta

Blue Line: Delays of about 15 minutes due to a disabled train at Maverick. Trains may stand by at stations. #mbtaalert #mbta

Red Line: Delays of about 10 minutes due to a disabled train at Park Street. #mbtaalert #mbta

Red Line: Delays of about 15 minutes due to a disabled train at Park St. Trains may stand by at stations. #mbtaalert #mbta

Red Line: Delays of about 15 minutes due to a medical emergency at Park St. #mbtaalert #mbta

Green Line B Branch: Delays of about 15 minutes due to a medical emergency at BU East. Trains may stand by at stations. #mbtaalert #mbta