Commuters wait as a train full of passengers arrives at the South Station Red Line subway stop, Wednesday, July 13, 2022, in Boston. Boston's public transit system is a mess, harried commuters and officials are increasingly looking to a Chinese-owned subway car manufacturer to account for some of the troubles. There have been fatal accidents, subway car collisions, malfunctioning elevators, and trains running on weekend schedules during rush hour. (AP Photo/Charles Krupa)