The MBTA’s effort to transform its bus fleet to all electric vehicles is getting a major boost from federal funds, with officials on Monday getting a look at how those dollars will turn an ancient garage into a modern one with zero emission battery electric buses.

State and federal officials broke ground on the MBTA’s new Quincy bus maintenance facility on Burgin Parkway, which is benefiting from the federal Bipartisan Infrastructure Law. The MBTA is receiving $2.2 billion over the next five years, including $420 million for stations and facility improvements — like the bus facility in Quincy…

The Quincy garage will open in 2024, and it will accommodate up to 120 battery electric buses.

The MBTA has already funded the design of the next facility in the queue at the Arborway in Jamaica Plain. That will lead to an all-electric fleet for that area, and will also help the MBTA expand service from that garage.