Metro

These photos show some of the damage caused by the Red Line train derailment

Signal bungalows were damaged during the Red Line train derailment at the JFK/UMass station on Tuesday.
Craig F. Walker/Globe Staff
Signal bungalows were damaged during the Red Line train derailment at the JFK/UMass station on Tuesday.

State transportation officials on Wednesday morning shared a series of photographs on social media that showed the extensive damage caused by a Red Line train that derailed at JFK/UMass station a day prior, leaving thousands of riders caught in the rain as they scrambled to catch shuttle buses during severe service delays.

The three images, posted to Twitter by Massachusetts Department of Transportation spokeswoman Jacquelyn Goddard, showed crushed and mangled signal bungalows full of wires and cables that are located in the area where the train car went off the tracks Tuesday.

“Photos taken today of infrastructure damage caused by #RedLine car derailment,” Goddard wrote in a tweet Wednesday morning.

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The Red Line train car that derailed early Tuesday morning, ahead of the busy commute, struck multiple signal bungalows outside of the station, transit officials said.

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The equipment, MBTA spokesman Joe Pesaturo said in an e-mail, “controls the intricate system of track, signals and switches at the point where Ashmont and Braintree trains diverge.”

In a series of tweets early Wednesday, MBTA officials further explained what happened to the signal bungalows at the time of the accident, and how it’s causing residual issues for commuters.

BOSTON, MA - June 12, 2019: Workers assess the tracks and a damaged structure on red line at the JFK / UMass T station in Boston, MA on June 12, 2019. (Craig F. Walker/Globe Staff) section: metro reporter:
Craig F. Walker/Globe Staff
Workers assessed the tracks and a damaged structure on red line at the JFK/UMass station on Wednesday.

“[The bungalows] are the sheds that house the hardware that controls our signal system,” T officials tweeted. “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.”

Officials said the “bungalows will need to be rebuilt, new signals & cables installed, tracks repaired.”

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“At this time, we can’t say how long that will take,” the MBTA tweeted. “For now, trains will continue to travel at slower speeds. We ask customers to allow extra time & use all available services.”

BOSTON, MA - June 12, 2019: Workers assess the tracks and a damaged structure on red line at the JFK / UMass T station in Boston, MA on June 12, 2019. (Craig F. Walker/Globe Staff) section: metro reporter:
Craig F. Walker/Globe Staff
Workers assessed the tracks and a damaged structure.

The MBTA announced Wednesday that service will be halted at 11 a.m., between North Quincy and the JFK station, so crews can access the tracks. Shuttle buses will be in use during the service disruption. The partial shutdown should last around three hours, officials said.

“During the suspension in service today ... inspectors will be able to perform a full assessment of the condition of the signals, and determine the scope of work necessary for repairs,” Pesaturo said. “Dozens of workers from the T’s Power, Signal and Track Departments will be performing multiple tasks, including repairs to the third rail, switches, signals, track, power feeds and cables.”

Pesaturo told the Globe that the damaged bungalows were to be replaced in two years under a previously announced $113 million signal project, and relocated off the right-of-way underneath the Southeast Expressway.

However, after yesterday’s derailment, “the team is working with the contractor, designer, and signal vendor to determine if they can accelerate the design and construction,” he said.

BOSTON, MA - June 12, 2019: Workers assess the tracks and a damaged structure on red line at the JFK / UMass T station in Boston, MA on June 12, 2019. (Craig F. Walker/Globe Staff) section: metro reporter:
Craig F. Walker/Globe Staff
Workers assessed the tracks and a damaged structure on Red Line at the JFK/UMass station.

Steve Annear can be reached at steve.annear@globe.com. Follow him on Twitter @steveannear. Emily Sweeney of the Globe staff contributed to this report.