Blue Line: Delays of about 10 minutes due to a switch problem near Orient Heights. Personnel are on site and service is proceeding. Please allow extra travel time. #mbtaalert #mbta

Blue Line: Delays of about 10 minutes due to a signal problem at Maverick. #mbtaalert #mbta

Blue Line: Delays of about 10 minutes due to a signal problem between Revere Beach and Beachmont. Trains may stand by at stations. #mbtaalert #mbta

Green Line D and E Branch: Delays of about 15 minutes due to a disabled train at Science Park. #mbtaalert #mbta

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

Orange Line: Delays of about 20 minutes while personnel address a signal problem at Forest Hills. Trains may stand by at stations. #mbtaalert #mbta

Red Line: Delays of about 10 minutes due to a signal problem at Harvard. Trains may stand by at stations. #mbtaalert #mbta

Orange Line: Delays of about 10 minutes due to late completion of overnight track work at Forest Hills. Service is proceeding. #mbtaalert #mbta

Green Line C: Delays of about 15 minutes due to an unauthorized auto on the tracks near Washington Square. Trolleys may stand by at stations. #mbtaalert #mbta

Red Line: Delays of about 10 minutes due to police activity at Savin Hill. #mbtaalert #mbta

Orange Line: Delays of about 15 minutes due to a signal problem near Oak Grove. Trains may stand by at stations. #mbtaalert #mbta

Orange Line: Delays of about 10 minutes due to a signal problem near North Station. Trains may stand by at stations. #mbtaalert #mbta

Red Line: Delays of about 10 minutes due to a disabled train at Charles/MGH. Trains may stand by at stations. #mbtaalert #mbta

Green Line E: Delays of about 20 minutes due to an unauthorized vehicle on the tracks between Huntington Ave and Vancouver Street. For alternate service, passengers may utilize the Route 39 bus for local pickup. #mbtaalert #mbta

Green Line C Branch: Delays of about 15 minutes due to police activity near Summit Ave. Trains may stand by at stations. #mbtaalert #mbta

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

Green Line E Branch: Delays of about 30 minutes due to an auto accident blocking the tracks at Riverway. Passengers can use the Route 39 bus for alternate service. #mbtaalert #mbta

Orange Line: Delays of about 15 minutes while the Signal Department works in the track area at Oak Grove. Trains may be held or crossed back for service. #mbtaalert #mbta

Green Line: Delays of about 15 minutes due to police activity near Arlington. Trains may stand by at stations. #mbtaalert #mbta

Blue Line: Delays of about 15 minutes due to a disabled train at Maverick. The train is being taken out of service. #mbtaalert #mbta