The first of 24 new Green Line cars has arrived in Massachusetts for testing and is expected to join the Green Line fleet this summer,  the Globe reports.

The new trolleys, known as “Type 9,” differ slightly from existing Green Line cars: They can fit about 10 percent more passengers, and inside they have bright yellow handrails, intended for better visibility, for passengers to hold onto, compared with the usual chrome. Also, the doors open by sliding to the side rather than pushing outward, which should be less disruptive for passengers on platforms.