GLOSSARY

Automated Parking (Automated Robotic Parking Structures)

An automated parking system (APS) parks and retrieves vehicles by machine: the driver leaves the car in an entry bay, and lifts, shuttles or robots move it into storage and bring it back on request.

ENTRY BAY · DRIVER EXITS LIFT RACKED STORAGE · NO RAMPS, NO AISLES
In an automated (robotic) structure the driver leaves the car at an entry bay and machinery racks it. With no ramps, aisles, or headroom for people, the same cars fit in far less volume.

Because no one drives inside the storage area, an APS needs no ramps, drive aisles, stairs or walking paths between cars. That lets it fit far more vehicles into the same volume than a conventional garage, which is why it appears on tight urban sites, under buildings, and where excavation is expensive.

How it works

  • Drop-off. The driver pulls into a transfer bay, checks that the car is positioned, and leaves.
  • Storage. The system scans the vehicle, then moves it on a pallet or with a robotic carrier to an open slot.
  • Retrieval. The customer requests the car by card, app or kiosk, and the system returns it to an exit bay, often turned to face out.

Main types

  • Semi-automated and puzzle systems. Platforms shift sideways and vertically to free a space; common in residential buildings. See puzzle parking system.
  • Fully automated tower and rack systems. Lifts and shuttles serve fixed storage racks across many levels. See tower parking system and shuttle parking system; many carry cars on pallets.
  • AGV systems. Mobile robots slide under cars and carry them across a flat storage floor. See AGV parking.

Trade-offs to weigh

  • Peak throughput. Retrieval takes time, and a building that empties at 5 p.m. can queue. Size entry and exit bays for the peak, not the average. See APS throughput.
  • Dependence on maintenance. The garage is a machine. Service contracts, spare parts and redundancy decide whether cars come out on time.
  • Code and fire review. Many jurisdictions treat an APS as a special case (the building code calls it a mechanical-access parking garage), so involve the fire marshal and building official early.

The Parkonomics view

An APS buys space with operations. It can turn a site that will not fit a ramped garage into a workable one, but the owner is now running equipment, not a structure. The right test is the peak hour: model how many cars must leave in fifteen minutes and size the system for that, then price the service contract for the life of the building.

Related terms: Transfer Bay, Stack Parking, Tandem Parking, Vertical Reciprocating Conveyor, Retrieval Time, APS Throughput, Semi-Automated Parking

Further reading: The Evolution of U.S. Parking Structures in 2026