Theoretically, they could run more frequently. They could run every 3 minutes. Reality: that won't happen It costs money to run trains that might be mostly em

Theoretically, they could run more frequently. They could run every 3 minutes. Reality: that won't happen It costs money to run trains that might be mostly empty, so they are run less often, which makes them less used, which makes them run less often, and so on. At best, reality looks more like this: https://www.mbta.com/schedules/CR-Lowell/timetable https://www.mbta.com/schedules/CR-Lowell/timetable That's 21 trains per weekday. Weekend days get only 8 trains. Amtrak is much much worse. At that service level, you could get 1 train per week, seasonal.