BOSTON, MAY 13, 2019.....The cost to replace all outdated equipment and infrastructure across the MBTA system with modern alternatives is about $2.8 billion more than the previous state-of-good-repair price estimate, officials said Monday.

In 2015, MBTA officials said addressing the entire maintenance backlog would cost about $7.3 billion, and they have cited that figure for years. But an assessment unveiled Monday, using new data about inventory and conditions collected over the past year put the total modernization and replacement price tag at $10.1 billion.