Fairfax County supervisors on Monday approved a major development project next to the Dunn Loring Metro station, the latest in a series of rail-oriented developments poised to sprout throughout the county.

The plan by developer Trammell Crow to build up to 720 dwellings, shops and a new Metro parking garage passed unanimously despite concerns from local PTA groups that wanted to ensure education dollars promised by the developer went to the most-affected nearby schools. Officials insisted that would be the case.