According to the CNAI report, MBTA facilities require the most attention with $6.4 billion needed. Another $5.3 billion is needed to fix structures and another $2.4 billion would be used on trains.

Nearly two-thirds of all MBTA assets are not in a state of good repair, and it would cost $24.5 billion to fix all of those issues, the agency concluded in its latest assessment.

BOSTON — The MBTA, which has struggled with maintenance for years, is now faced with an unfolding police investigation at a major maintenance yard that has already resulted in numerous employees ...

The MBTA estimates that it will cost a whopping $24.5 billion to bring its dilapidated system into a “state of good repair,” a price tag that has spiked by $14.5 billion since the agency’s ...