All tracts having a zoning classification of AR-1 or AR-2 shall have access roadways of not less than twenty-six feet in width and full width unobstructed access to a public street, alley or highway. The pavement shall be constructed on a properly prepared subgrade and shall consist of not less than six inches of portland cement concrete with integral curbing, or six inches of compacted aggregate base course and two inches of asphalt concrete surface course with portland cement concrete curbing or combined curb and gutter. Curbing may be eliminated to permit access to parking areas only.