By comparison: MBTA Boston (Green Line)
...Yesterday, local and federal officials continued to investigate Friday's crash and to evaluate possible criminal charges against ..., the operator who authorities said told them he was text messaging ... The crash near Government Center Station sent nearly 50 people to the hospital with noncritical injuries and totaled three trolley cars. Today 13:37
Sorry but dont see how this compares. If you are driving a train and you have your head down writing messages this is very different from saying some non work related comment during the descent.