Neighbors of a planned affordable housing duplex in Vineyard Haven prevailed this week when the Tisbury planning board voted to relocate the units’ shared driveway.

Island Housing Trust, which is developing the corner lot on Leland avenue at Franklin street, has proposed a curb cut on Leland and a continuous fence along Franklin, which IHT engineer Keith McGuire said is a safer design for the homes’ eventual residents.

Tisbury’s public works director Kirk Metell also favored the Leland avenue access, planning board chair Ben Robinson said at a continued public hearing Wednesday night. But during public testimony earlier this month, as well as in correspondence to the board, Leland avenue abutters have argued strenuously that a Franklin street driveway would be safer for their neighborhood.

Planning board member Elaine Miller expressed concern that should the neighbors not get their way, the new residents of the duplex would face an unwelcoming environment.

“I am concerned about people who might be occupying these spaces moving into a neighborhood with that kind of animosity,” Ms. Miller said. “I am vacillating between safety and a conformed community, which is a very strange situation for a planning board member to be considering.”

Board member Casey Hayward agreed that abutters’ feelings are worth considering, while member Connie Alexander — who lives on another street that crosses Franklin — firmly opposed the Leland driveway.

“It will be obscured from the incoming traffic and you could have a terrible accident,” Ms. Alexander said.

The board voted unanimously in favor of a special permit for the IHT development with conditions including the driveway move, fencing along Franklin and a footpath to Leland.

In other business Wednesday, the board approved a special permit for Main Street Medicinals, a marijuana production and retail operation planned for the end of Mechanic street off State Road. Conditions for the approval include a $25,000 donation to the town for affordable housing, as well as providing year-round housing for four Main Street Medicinals employees and funding sidewalks on Mechanic street and State road.

Both the IHT and the MSM decisions will be finalized in writing at upcoming board meetings.

Also Wednesday, the planning board continued hearings on drainage work at Sam Dunn’s mixed-used development on Main and Union streets, Xerxes Agassi’s project at the former Educomp building and a Main Street special permit application from Thomas L. and Patricia S. Bransford.

Mr. Dunn, who is adding a Mexican restaurant to his complex at the former Stone Bank property, will return to the planning board Oct. 4 at 11:30 a.m.

Mr. Agassi’s hearing was continued to Nov. 2 at 6:30 p.m. and the Bransfords’ to Nov. 16 at 6 p.m.