With this puzzle parking system, vehicles can park in grid-shaped slots on two levels. The SP-20 can be readily paired with the SP-21, and SP-31 as an extra row of parking because it is drive-through compatible. This type of combination parking system allows you to have even more parking places inside the same floor area since it eliminates the need for a second access lane. To get the parking spaces where they want them, they are shifted both horizontally and vertically. Up to 19 cars and 2–10 grids can be used with this setup.