CNR MA to supply rolling stock for Boston Subway; real-time tracking for Green Line completed October 22, 2014 | North America Company News The Massachusetts Department of Transportation has awarded a USD566.6-million contract to China-based CNR MA Corporation (CNR MA) to supply 284 cars for the Boston Subway. The order includes 152 cars ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password