At 8:41 a.m., State Police reported:
RT 90 EB, east of Prudential Tunnel, 2 MBTA buses collide.One driver injured, right lane closed.Traffic delays
In addition to the driver, three passengers were taken to Tufts Medical Center, State Police say. Uninjured passengers were transferred to another bus for the rest of their journey.
The T reports the crash is responsible for minor delays on the 501, 502, 503, 504, 505, 553, 554, 556 and 558 routes.