Boston June 28, 2019 11:30 pm Green Line Operator Teaches Riders MBTA History Tim Murphy is an MBTA Green Line operator who has found a way to teach while traversing the tracks. US & World Videos 0:17 Child injured after being struck by car outside Saugus mall 2:23 Search for suspect after sexual assault reported in Cambridge 4:09 Budgets, staffing, and social media can all impact violence in schools, administrators say 2:35 Sumner Tunnel closed for weekend 2:16 Bruins fans disheartened by season-ending loss