While the proposed Oak Bluffs roundabout has received most of the press, Tisbury is quietly moving forward with another long-planned major traffic management infrastructure project: a proposed system of connector roads that would link Edgartown-Vineyard Haven Road to State Road and bypass the summer crush in Vineyard Haven. But unlike the roundabout, the state hasn’t been forthcoming with money for the proposed $3 million project. Now it’s up to voters to decide whether to build the connector system.