On Saint Patrick’s Day, March 17, MARTA went green by unveiling an electric bus that is part of the transit agency’s pilot program.

The bus, a 40-foot Proterra Catalyst, is on loan to MARTA. The current bus fleet is a mix of diesel, hybrid and compressed natural gas vehicles, a press release from MARTA says.

The bus will seat 40 passengers and can travel three hours on a single charge.

“MARTA Operations has outfitted the test routes with periodic rapid charging stations,” the press release from MARTA says. “The Catalyst fully recharges in approximately 10 minutes.”

The transit agency sent a few photos from today’s unveiling at MARTA headquarters: