The first of the long-awaited new MBTA Orange Line trains debuted on Wednesday afternoon. It performed three round trips, which drew plenty of excitement -- and derision around the city. There was one train with six cars that left from Wellington Station exciting riders...and made its way back to the station in the afternoon...thus, teasing expectant riders. There will be 152 new Orange Line cars when all is said and other cars are currently undergoing testing. Presently, there are 120 Orange Line cars, so the fleet is increasing, and that will increase the capacity of the line by 30,000 seats daily.