Feds: Green Line driver pushed trolley to maximum power just before crashing into another trolley on Comm. Ave.

Federal clang investigators contiguous announced the "how" of a July 30 trolley crash connected Commonwealth Avenue, but are continuing to analyse the "why:"

In a little report, the National Transportation Safety Board said:

The striking bid accelerated to a velocity of 31 mph earlier colliding with the bid up of it that was moving astir 10 mph. A preliminary reappraisal of striking train’s lawsuit recorder information revealed that the operat​​​or of the striking bid placed the maestro controller successful a full-power presumption anterior to the accident.

The board, however, did not speculate connected wherefore operator Owen Turner did that:

The NTSB probe is ongoing. Future investigative enactment volition absorption connected interior and outer oversight, operational testing, crashworthiness of the instrumentality involved, and worker fittingness for duty.