The MBTA is proposing to build a garage to service a new generation of battery-powered buses in a corner of the Arborway bus yard in Forest Hills.
The public will get a chance to see and discuss the plans at a public meeting on Dec. 9.
Rather than tear down any of the existing bus-yard buildings, which now service CNG buses, the T says it will build the new garage on a corner of the yard at Washington Street and the Arborway.
The T used to call the Arborway yard, expanded after the end of Forest Hills trolley service in 1985 "temporary" - it once even proposed a smaller $200-million replacement that would allow for construction of housing on part of the site.
Now, the T says it needs an even bigger maintenance building for buses it plans to start running on 2027 that will use batteries - although with diesel heating systems. The T says it will start retiring the current CNG buses in 2028.
The T says the new buses will be cleaner than the current CNG models and, at 60 feet, will be longer than the present buses, which it says will let them carry more buses and add additional service to Roxbury, Mattapan and Dorchester.
The Arborway yard, kitty corner from the Forest Hills T stop, handles buses on routes across Boston's southwestern neighborhoods aimed at getting riders to and from the Forest Hills Orange Line and commuter-rail stops, as well as crosstown lines to other parts of the city, including Ashmont, South Bay, Nubian Square and Cleveland Circle.