| Berkshire Line | 85.9 |
| Berkshire Subdivision | 95.4 |
| Boston Subdivision | 97.3 |
| Concurrent (MBTA) Subdivision | 18.5 |
| Conn River Subdivision | 49.4 |
| Connector (MBTA) Subdivision | 2.8 |
| Fairmount (MBTA) Subdivision | 8.6 |
| Fitchburg (CSXT) Subdivision | 32.5 |
| Fitchburg (MBTA) Subdivision | 48.9 |
| Framingham Subdivision | 21.1 |
| Franklin (MBTA) Subdivision | 21.4 |
| Gardner Subdivision | 26.3 |
| Greenbush (MBTA) Subdivision | 17.5 |
| Hartford Line | 60 |
| Haverhill (MBTA) Subdivision | 34.6 |
| Kingston (MBTA) Subdivision | 25.7 |
| Lowell (MBTA) Subdivision | 23.7 |
| Main Line | 37.5 |
| Middleborough (MBTA) Subdivision | 24.1 |
| Needham (MBTA) Subdivision | 8.7 |
| Newburyport (MBTA) Subdivision | 17.5 |
| North Station (MBTA) Subdivision | 1.8 |
| Northeast Corridor (CT,MA,RI) | 159.1 |
| Norwich Subdivision | 70.3 |
| Old Colony (MBTA) Subdivision | 10.8 |
| Palmer Subdivision | 173.1 |
| Patriot Corridor | 149.1 |
| Rockport (MBTA) Subdivision | 16.4 |
| Stoughton (MBTA) Subdivision | 4 |