Autonomous multi-tier racking and retrieval system for delivery vehicle

An autonomous racking system for use with a mobile delivery vehicle includes an array of flow racks configured to receive thereon a plurality of containers each of which associated with a single customer and a plurality of pushers configured to push each one of the containers past a front end of the array. An elevator abuts the front end of the array to receive one or more containers from at least one of the array and a vehicle side access portal, and to deliver one or more containers to one or more of the plurality of flow racks from the portal. The elevator comprises a plurality of loading pushers configured to push a container off of the movable carriage and onto the array. A controller is operable communication with a plurality of pusher drives, an elevator drive motor, and one or more elevator position sensors.