3. Spaces in parking lots shall be set back from the street lot line to whatever
3. Spaces in parking lots shall be set back from the street lot line to whatever extent may be necessary in the specific situation, as determined by the Zoning Board of Appeals, to avoid the probability of cars backing or otherwise maneuvering on the sidewalk upon entering or leaving the space. In no other case -28- shall parking lots be designed to require or encourage cars to back onto a public or private way in order to leave the lot.