23 Injured in Boston as Trolleys Collide On 7/30/21 at 7:32 PM EDT 23 people have been injured during a Green Line train collision on Friday. Three trains collided while traveling Eastbound of each other, according to the Massachusetts Bay Transportation Authority. A woman who witnessed the crash told local news station WHDH that she noticed a woman with injuries to her leg and another woman being lifted onto an ambulance. Another man who was on the third train told WHDH that there weren't any warnings prior to the collision. "All of a sudden the train just jerked forward really quickly. It was like the worst amusement park ride you can imagine," the man said.