we have already shown that for a single parking space to make the most efficient use of area in a 100’ x 200’ lot, it should be positioned perpendicular to the aisle.
now, to make that even more efficient, put another perpendicular parking space on the other side of the aisle so that they share the aisle area.In effect, this reduces the aisle area per parking space by a factor of 2 since we have disallowed “doubling up” this is the most efficient way to position two parking spaces.we have called these two spaces and the aisle between them our “tile”: