(a) Where a subdivision abuts an existing public right-of-way which has a width deficiency created either because it is less than fifty feet (50') in width or because adopted plans show that a greater width will be necessary to accommodate those plans, the subdivider shall be required to dedicate additional rights-of-way as follows:

(b) Where the subdivision embraces any part of an arterial or collector street or thoroughfare shown on an approved Comprehensive Plan, official map, or state or regional transportation plan, such street or thoroughfare shall be platted for dedication in the location and width indicated on such plan or map or as deemed necessary by the Virginia Department of Transportation (VDOT) and, except in the case of a limited or controlled access facility, shall be constructed and integrated as a part of the subdivision.

(c) The minimum right-of-way width shall be fifty (50) feet, or such greater width as may be specified by the Virginia Department of Transportation Subdivision Street Design Guide based on its functional classification.