For multi-family developments and nonresidential uses, where there is an existing curb and gutter or sidewalk on the street at private road, a safety island along the entire frontage of the property shall be provided, except for the permitted driveways. On the two ends and street/private road side of each such island shall be constructed a concrete curb, the height, location, and structural specifications of which shall be in accordance with Chapter 22 of the Hummelstown Borough Code of Ordinances.