The MBTA reports it'll be shutting the subway line down at 11 a.m. to try to make signal repairs related to the derailment yesterday:
During the derailment, the train struck multiple signal bungalows outside of JFK/UMass. These are the sheds that house the hardware that controls our signal system.
Without the signal system, trains must be given permission from our Operations Control Center to move from one station to the next, one train at a time. This also means we need people along the tracks to physically set the routes to direct trains.
This failure prevents clear communication to train tracking, GPS apps, and countdown clocks. To avoid inaccurate predictions, we've turned off the countdown clocks across the Red Line.
Looking ahead, bungalows will need to be rebuilt, new signals & cables installed, tracks repaired. At this time, we can't say how long that will take.
For now, trains will continue to travel at slower speeds. We ask customers to allow extra time & use all available services.
We know this is a big ask. We sincerely appreciate all our riders' understanding and patience while crews work around the clock to fix this. We promise to keep updating you as more info becomes available.