Orange Line passengers will for the first time be able to ride a brand-new train Wednesday that Gov. Charlie Baker touted as a key step to "turn the corner" into better MBTA service.

Baker, Transportation Secretary Stephanie Pollack and MBTA General Manager Steve Poftak unveiled the new six-car train to the media Wednesday morning shortly before introducing it into passenger service.

"This is a day a lot of people have been waiting for," Pollack said.

The new cars, which are equipped with digital screens and plastic interiors, are the first in the MBTA's plans to replace the whole Orange Line fleet with a larger one by the end of 2021.

Once that work is complete, officials said, the Orange Line will accommodate tens of thousands more passengers and will run about five more trains per hour during morning rush hour.

The graphic shown above is courtesy of the MBTA.