Consider This: Where's the T in safeTy?

The MBTA continues an investigation into a Green Line trolley collision that sent four operators to the hospital.

The incident comes less than a year after a Green Line line trolley collided with another last July, and is one of several incidents to occur since that time, calling the T’s safety into question.

Consider This host Darryl C. Murphy speaks with Boston Globe transportation reporter Taylor Dolven, who has been covering these events.