Abstract: Systems, methods, and apparatuses for selectively shifting and staging storage structures in a storage space are provided. Systems, methods, and apparatuses for dynamically organizing packages based on a travel route are also provided. In embodiments, a plurality of parcels may be stored on storage structures located within a vehicle and each storage structure may be provided in a modular assembly. During a delivery operation, the system may determine which parcels are next to be delivered and, either based on predetermined information or dynamic information, may adjust the position of the storage structures within the vehicle using shifting mechanisms and control systems coupled thereto to present the appropriate parcel for retrieval from the vehicle.