The SP31’s entrance is located on the ground floor. Cars can park in grid-like arrangements on three different floors with this puzzle parking system. Parking spots are shifted both horizontally and vertically, either up to the third parking level or down into the pit. The desired parking spot is shifted into place. This indicates that more cars may fit on the same floor area. Up to 2–10 grids and 5–29 automobiles can be used with this system.