Keolis, MBTA seek bids for battery-electric trains on Fairmount Line in US

Keolis and the Massachusetts Bay Transportation Authority (MBTA) are seeking bids for seven battery-electric multiple unit (BEMU) trainsets for operation on Boston’s Fairmount Line in the US.

Set to launch in 2028, the project aims to cut emissions and enhance safety, reliability, and service frequency.

The Fairmount Line electrification project forms part of Massachusetts Governor Maura Healey’s transportation infrastructure modernisation plan.

The $8bn modernisation plan aims to reduce greenhouse gas emissions by offering decarbonised transport solutions.

The BEMU trainsets trains will utilise hybrid technology, combining onboard batteries with overhead wire power.

With intervals of every 20 minutes during weekdays, the trainsets are expected to ensure frequent service and shorten journey times.