Orange Line
Ruggles station
Northeastern University has expanded substantially east towards Tremont Street since the Orange Line was moved to the Southwest Corridor in 1987. The Interdisciplinary Science and Engineering Complex was completed in 2017. As a part of the project, NU constructed a pedestrian bridge just north of the MBTA busway.
Ruggles station
Originally, only tracks 1 and 3 could platform at Ruggles, causing operational restrictions for both Amtrak and commuter trains as Amtrak needed track 1 for southbound trains and the MBTA needed track 1 for northbound peak-period commuter trains to allow them to serve Ruggles. This was only just resolved by constructing a new platform for track 2 in 2021.
Ruggles station
It's my understanding that the north end of the tracks 1/3 platform had been "closed for repair" for quite some time, but not why. Other than the missing tactile edge treatment there isn't anything obviously justifying a long-term closure. (No I didn't pass the barrier to investigate for myself!)