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Keolis: Fairmount Commuter Rail line derailment caused by 'human error'

Impacts from a low-speed train derailment outside of South Station Tuesday will affect riders on the Fairmount Line Wednesday as crews continue work to re-rail one of the cars and inspect the tracks, a spokesperson for Keolis said in a statement.

Latest updates:

1:00 p.m. - Keolis spokesperson Tory Mazzola says Tuesday's slow-speed train derailment was caused by "human error." The investigation is onoing.

8:19 a.m. - A Keolis spokesperson says the damaged rail car has been removed and crews are now inspecting the track, but they do not yet have an estimate of when regular service will resume.

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5:06 a.m. - Shuttle buses will replace train service for riders on the Fairmount Line.

4:45 a.m. - The Fairmount Line will not operate Wednesday morning as crews work to inspect and re-rail train cars after Tuesday night's derailment, a Keolis spokesperson said in a statement. Passengers will be bused on a schedule running "similar to the Fairmount Line train schedule." Keolis said it would give additional updates throughout the day but did not say when service is expected to resume.

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April 9, 11:23 p.m.

The MBTA Commuter Rail's Twitter account alerted commuters to the news Tuesday night, saying the Middleborough/Lakeville, Kingston/Plymouth and Greenbush trains from South Station had not departed due to the low-speed, upright derailment outside of the station.

Initially, the MBTA said the Greenbush train was 10-20 minutes behind schedule, but the timeframe was bumped up to 40-50 minutes shortly thereafter.

The Greenbush train was then able to depart the station around 9:26 p.m. and the MBTA said it was operating 60-65 minutes behind schedule.

Other trains were forced to operate at reduced speeds, with more delays expected due to the derailment.

A Keolis spokesperson said an out of service train was leaving the maintenance yard when it made contact with the Fairmont Line train.

The Fairmont Line train had four passengers on board, while the out of service train had no passengers on it.

There were no injuries to the crews on either train or any passengers, and the incident is under investigation.

A Keolis spokesperson said there are three coach cars that were derailed, and said it was expected to take hours to right the trains and get the line back in service.

Keolis also said an inspection will have to be done on the infrastructure, the rail ties and tracks to make sure they are safe for travel.

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