(a) The following requirements shall apply to special street types:
(1) Cul-de-sac streets shall not generally exceed 600 feet in length and have a minimum length of 160 feet. The closed end shall be a paved turnaround having a minimum radius of fifty feet to the outer pavement edge and a radius of sixty feet to the right-of-way line. Pavement shall cover all area within the outer pavement edge. However, cul-de-sac streets with a radius of eighty feet or greater may have an open space in the center for landscaping, so long as maintenance responsibilities of such open space are provided by adjacent property owners or the developer through deed covenant.
(2) Permanent dead-end streets shall not be permitted. Temporary dead-end streets shall be permitted only as part of a continuous street plan, and only if a temporary turnaround satisfactory to the Municipal Engineer in design, maintenance and removal is provided. Temporary dead-end streets longer than 200 feet shall not be permitted.
(3) Dedication of new half-streets shall not be permitted. Where a dedicated or platted half-street exists adjacent to the tract being subdivided, the other half shall be platted.
(4) Where a subdivision adjoins an arterial street, a marginal access street may be required to control access to the arterial from lots fronting on it. Access is controlled in the interest of public safety and to maintain the design capacity of the street system. Points of access to the arterial shall be spaced at a minimum of 1,000 feet. A planting strip having a minimum width of twenty feet shall be provided between the pavement of the arterial street and the pavement of the marginal access street. The Planning Commission, before approving minimum width for the planting strip, shall take into account the physical location of major public utility lines as they relate to the existing and potential development along both sides of the highway. The minimum width of the marginal access right of way shall be thirty feet.
(5) Alleys may be approved in residential districts. Alleys may be required in commercial and industrial districts if other provisions cannot be made for adequate service access. When required, alleys shall have a minimum right- of-way width of twenty feet and a minimum pavement width of twenty feet.