The MBTA is dumping nearly a billion dollars in revenue from the Massachusetts millionaire’s tax on projects officials say are aimed at enhancing safety and reliability, while the agency transitions to an in-house bus maintenance program.

The network’s Board of Directors has approved using $850 million from the millionaire’s tax to fund four “major infrastructure projects,” including a battery-electric bus maintenance facility that will support up to 200 vehicles.

This is the second allocation that the T has used to bolster its infrastructure from what officials refer to as the Fair Share Amendment. The board approved a $200.8-million initial pool in January 2024 that addressed safety and hiring and retaining employees.

Bay State voters in November 2022 approved a 4% surtax on incomes a

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