Authorizing the revision of lines and grades on a portion of City Plan No. 63 by relocating the northeasterly curbline of the Benjamin Franklin Parkway, from Twentieth Street to Twenty-first Street, two feet southwestwardly and relocating portions of certain curblines within the area bounded by the Benjamin Franklin Parkway, Twenty-first Street, Pennsylvania Avenue, and Twentieth Street to establish certain curb bump-outs and corner radii, under certain terms and conditions. — Open Common Ground