More than a year after a Green Line train lurched off the tracks near Lechmere on Oct. 1, 2024, newly released surveillance footage finally shows the exact moment things went sideways, sending riders scrambling across the rails. Roughly 50 people were aboard, and seven riders were taken to nearby medical facilities with minor injuries after the derailment. The video adds stark, graphic context to what federal investigators had already laid out on paper.
The clip, released this week, shows the lead car lifting and tipping at the Red Bridge interlocking as passengers pour out and climb across the tracks toward a service road. According to NBC Boston, seven people were taken to medical facilities with minor injuries.
What the NTSB found
In its final report, the National Transportation Safety Board determined the probable cause was “the operator failing for unknown reasons to obey a stop signal,” according to NTSB. The board said the leading railcar entered a 10-mph zone at about 36 mph and that the first wheelsets ran straight while the next sets took the diverging track, causing the car to derail. Investigators also cited gaps in MBTA speed-compliance audits and recommended safety technologies to reduce the consequences of human error.
MBTA response and staff action
The MBTA has said it issued a safety alert, reduced the speed limit on the eastbound approach to the Red Bridge interlocking, and begun installing inward- and outward-facing cameras and GPS-based speed monitoring. In coverage of the newly released video, NBC Boston reports the operator involved is no longer employed by the MBTA and that the agency is rolling out a phased Green Line Train Protection System with operator warning alarms now being added; the agency has described plans to have Automatic Train Control in place by June 2028.
Why the video matters
The footage underscores long-running calls for automated protections on surface trolleys, where drivers must rely on sight lines and wayside signals rather than fail-safe train control. As WBUR and other outlets note, transit experts told investigators that systems like ATC or operator-warning tools could have prevented the overspeed and the split-wheelset event that led to this crash.
For readers who want to review the evidence, the NTSB’s public docket includes surveillance clips, signal logs and interview transcripts used in the investigation; see the NTSB docket for the full file. MBTA officials say protections will be phased in over the coming years as the agency completes testing and installation.
