“I like the raised seats in the middle, it’s more accessible,” said Colen Fredrickson, 26, who works in the city’s planning department.

He checked out the model with his brother, Jared, 23, who called the new design “great.”

Isaac Whetzell, 13, who described himself as a “transit geek,” was eager to experience the new model. “I like the design, it’s more modern,” he said. “It’s not perfect but nothing is, it’s an improvement.”

The MBTA signed a $810 million contract with CAF USA Inc. to design and build 102 new Green Line vehicles. Test vehicles are expected to arrive in 2026, and full service is expected to roll out in spring 2027, according to the MBTA.

T officials are planning a news conference Wednesday on City Hall Square with CAF USA leaders to celebrate the final model. The new trains will prioritize passenger comfort and accessibility. New features include wider doors for easier boarding, improved seating arrangements for increased capacity and improved lighting for a more welcoming atmosphere, the MBTA said.

One longtime rider wonders if the new design will fit the T’s older tracks.

“There are more safety concerns now because (MBTA) has installed new equipment that doesn’t fit into the old system,” said David Carr, 72, a retired court official who took the route. Green line to work for years.

“I hope it will be calmer and we will stay on track,” he said.

Rachel Umansky-Castro can be reached at [email protected].