storage towers 32 consisting of multiple levels 27 b automobile platforms 20 transported vertically by movement chains 26 c an upper lateral transfer area 30 consisting of idlers 100 and horizontal movement chains 102 and d a lower lateral transfer area 36 consisting of idlers 100 and horizontal movement chains 102 it will be appreciated that the simultaneous parking garage system 10 provides a parking garage that efficiently utilizes the space the simultaneous movement of the automobile platforms 20 provided by the vertical movement chains 26 alleviates the need for elevator shafts this provides more space for the parking of automobiles because there is no space in the system dedicated for an elevator shaft the simultaneous movement of the automobile platforms 20 also simplifies the process of loading and unloading automobiles from the system this is most beneficial when a car needs to be unloaded in some conventional parking garage systems retrieval of an automobile requires the movement of other automobiles to gain access to the automobile that needs to leave the system the present invention allows an automobile to exit the system without re arranging other automobiles the system merely has to circulate until the desired automobile platform 20 is at an exit level either lower level position 90 a fig4 may be used as an entry or exit alternatively the system 10 may be partially subterranean if by example ground level is at 92 fig4 in which case position 90 b could function as an entry or exit the simultaneous system also makes.