Planning for a two-tower building and associated work on Massachusetts General Hospital’s West End campus is moving forward, but some citizens are voicing dismay over what they see as the project’s lack of transparency and doubt the strength of MGH’s commitments.

MGH’s new building will be at 55 Fruit Street and is intended to both increase the hospital’s patient capacity and replace outdated parking facilities. The building will have 481 inpatient beds, putting the hospital’s net gain from the project at 94 beds as many existing spaces would be converted to single rooms from double ones.

The building would have 191 new vehicle parking spaces, 566 new bicycle parking spaces, 24 procedure rooms, 120 exam rooms and a variety of public areas and businesses such as restaurants.

An online public meeting on June 7 included several testy exchanges. Some people said the process was stifling outside input and expressed outrage that the design’s power grid would use products from a nearby natural gas power plant.

“People in the chat said this doesn’t feel like a public meeting, because it’s not. None of the participants from the community can actually see each other to engage in a conversation as we would in person,” said Michele Brooks, a Sierra Club worker currently in Austin.

The project’s planners hope it would reduce traffic congestion on the streets around the proposed building. Widening sidewalks and some traffic reorganizations would be part of the plan to make the area safer.

“Everyone who uses Cambridge Street, whether walking, on a bicycle or in a car, believes it is not suiting their needs,” said state Rep. Jay Livingstone. “That’s probably the part of the project that needs the most work.”

There were also questions raised about the landscaping plans, which rely heavily on trees to shade the new wide sidewalks.

“These landscaping plans are always fabulous and look wonderful in their early stages and in diagrams, but maintenance and ongoing care of these landscapes is what determines their long-term value,” said community member Edward Fleck. “I can’t find a tree pit anywhere on campus that had a tree of that maturity that hasn’t died and been replanted three times in the last ten years.”

Another concern was lighting during construction, with the first tower to be completed in 2027 and the second in 2030.

“The residents are going to be living through construction for the better part of a decade. During the construction of the Yawkey Building lights were often left on 24/7. MGH’s responses have not addressed this question,” said Nathaniel Walton.

Nick Haney, an MGH spokesman, said lighting had not yet been considered but could be addressed in the final construction management plan. Livingstone said that while some details remain to be finalized, MGH’s process has ensured that planners know the community’s needs. He highlighted the hospital’s new commitment to biannual meetings with community members, something that could prevent the public misconceptions that have plagued previous MGH projects. “They’re proposing a large new structure in a place where a large structure doesn’t exist. There’s just going to be stuff that flows from that,” he said. “But they’ve been very responsive to community issues. They’re not rushing this project. They really want to get it right.”