GreenStar Cooperative Market’s Board of Directors has signed a 20-year lease to open a branch at 307 College Ave.

Members of the Planning and Development Board said Tuesday that the developers of Collegetown Crossing — a proposed six-story building at 307 College Ave. — must provide the City of Ithaca with a study about future residents’ projected car use in order to move the project forward.

A group of students and advocates rallied behind a proposal to construct a GreenStar grocery store at 307 College Ave. Tuesday, decrying arcane and obstructionist city parking requirements that they said were preventing the natural foods market from flourishing in the heart of Collegetown.