Off-street parking regulations are established to achieve, among others, the following:
(a) To relieve congestion so streets can be utilized more fully for movement of vehicular traffic;
(b) To promote the safety and convenience of pedestrians and shoppers by separating parking areas and extensive car movements in the vicinity of pedestrian ways;
(c) To protect adjoining residential neighborhoods from on-street parking; and
(d) To promote the general convenience, welfare and prosperity of residential, business, service and manufacturing developments which depend on off-street parking facilities.