To permit turnaround, driveways of 200 feet or more in length (from street to principal structure) shall provide either a K-turn with at least 50 feet depth, at least 14 feet improved width, and at least 45 feet center line radius, or a loop of at least 14 feet improved width and at least 45 feet center line radius, or other equivalent facilities approved by the Fire Prevention Bureau, within 200 feet of the principal structure.

For driveways longer than 50 feet (from street to principal structure), horizontal curves shall have a center line radius of at least 45 feet and improved width of at least 14 feet, and the remainder of the driveway shall have an unobstructed width of at least 12 feet (for instance, at gates).

At the intersection of a driveway longer than 50 feet (from street to principal structure) with the street, the first 30 feet of the driveway shall not have a change in slope in excess of 15% inclusive of the crown of the road. All angles between the driveway center line and the street shall be 60° or more.

See also Subsection 12-23.19d.