Feds: The trolley that rear ended another trolley on the B Line was going 20 m.p.h. faster

The National Transportation Safety Board reported contiguous that its archetypal findings from Friday's B Line crash showed that an outbound trolley traveling astatine 30 m.p.h. plowed into the backmost of a trolley going conscionable 10 m.p.h. astatine Pleasant Street.

The NTSB says it has recovered information from the "striking" trolley's lawsuit recorder, which tracked the trolleys speed, brake application, doorway positions, horn usage and different information.

The board, which says a last study and conclusions could instrumentality up to 2 years, says the unit of the collision injured 27 radical connected the 2 trains and derailed 3 of the 4 cars involved.

It did not speculate connected the origin of the crash. A strategy designed to forestall 1 trolley from smashing into different - which the NTSB recommended aft Green Line crashes successful 2008 and 2009, is inactive years away.

In summation to NTSB investigators, the MBTA and the authorities Department of Public Utilities are besides taking portion successful figuring retired what happened. The Carmen's Union has been offered a relation successful the probe arsenic well, the NTSB says.