The arrangement, character, width and location of all arterial and collector thoroughfares or extensions thereof shall conform to appropriate Major Thoroughfare Plans. Thoroughfares not contained in the aforementioned plans shall conform to the recommendation of the Planning Commission based upon design standards set forth in Sections 1117.03 to 1117.13. No final plat of land within the area in which existing zoning regulations are in effect shall be approved unless it conforms with such regulation.