Tower has one lift that takes the cars up and down to upper levels or in the pit and sliding mechanism to put the parking platform at empty space. A tower can have as many as 25 levels above ground and/or 25 levels below ground making it one of the most efficient parking system. It is a fully automatic product with single entry/exit points. In normal cases it has a lift at the center and one row of parking to its either sides. Number of parking rows can be upto 3 at either sides but it increases average retrieval time to considerably.