West Tisbury selectmen have voted to refer the proposed roundabout at the Oak Bluffs four-way blinker intersection to the Martha’s Vineyard Commission for review as a development of regional impact (DRI).

On Wednesday West Tisbury selectman Richard Knabel argued that the $1.1 million state project tripped article 3.701 of the commission’s so-called DRI checklist, which provides for any construction or expansion of facilities that “exist as part of an internal regional transportation system for the Island.”

The move comes less than a week before Oak Bluffs voters will vote whether to approve the roundabout project at Tuesday’s special town meeting.

Oak Bluffs selectmen briefly discussed whether to refer the roundabout at their board meeting last night but, based on the ongoing support for the project from the commission’s executive director, decided against doing so. West Tisbury selectman Jeffrey (Skipper) Manter today voted against referring the project to the commission, saying that he was uncomfortable interfering with a neighboring town’s project.