MBTA officials plan this summer to show off a model of the new Red Line trains getting assembled in Springfield.

BOSTON (CBS) -- Commuters got a sneak peek of the MBTA's new Red Line cars on Tuesday. A model will be on display at Boston City Hall this week.

Passengers on the first MBTA train to leave the city today will find a shiny double-decker coach added to the train sitting on the platform. Train No. 506 is one of five trains on the Worcester-Fra… ...