One day before he was scheduled to receive a safety award, a Green Line operator at the controls of an outbound trolley slammed into a waiting trolley at Boylston Street Station Thursday. The crash sent 37 people to area hospitals with minor injuries and shut down service on the Green Line’s busiest section for about three hours, officials said.
MBTA inspectors ruled out track and signal problems and were continuing to investigate whether the crash — which they likened to a rear-end fender bender at a stoplight — was caused by equipment failure on the 25-year-old trolley or by the driver, said T spokesman Joe Pesaturo.

Comments
If it's not one thing it's another Boston. Always some lousy excuse.
The Green LIne had serious signal problems in that part of the track on Wednesday (the day before the crash). I know, because I was on the train. Trains were seriously backed up. Ever since the fares went up service has worsened. Ridership appears to be up given that many lines are jammed at any time of the day - but the system is a disgrace. The state has indicated an interest in decreasing car use in the city in an effort to 'green' up Boston, but who will stop driving with this as an alternative? I live in Cambridge and can often walk almost anywhere in the Cambridge/Boston area in less time than it takes by public transportation.
Get it together, folks - this is an embarrassment.
Please don't expand the Green line to Medford...you say it is unsafe and inefficient...why would you extend the tracks and push more people onto this overburdened line? You can't afford safety stop equipment, so you should not expand and risk compounding the problem.