What Is Automated Parking?

Automated parking, also referred to as smart parking or an automated parking system (APS), is the use of machinery, sensing, and control software to store or maneuver a vehicle into a parking space with reduced or no driver input. The term covers two distinct engineering traditions that have converged. One is mechanical: a building-scale system of lifts, shuttles, and pallets that moves a parked car through a structure while the driver waits outside. The other is vehicular: onboard perception and control that steer a car into a space, either with the driver present or with the vehicle operating unoccupied. A third strand, parking guidance, applies sensing and networking to the problem of finding a free space rather than occupying one.

All three depend on the same underlying capabilities: reliable detection of occupancy and obstacles, path planning in a tightly constrained space, and a safety case strong enough for operation around pedestrians. Because parking maneuvers happen at low speed in confined geometry, the tolerances are measured in centimeters and the dominant risk is contact rather than collision energy.

Mechanical Parking Structures

Mechanical automated parking predates any form of vehicle autonomy. In a fully automated garage the driver leaves the car in a transfer cabin, and the vehicle is then moved by a combination of vertical lifts, horizontal shuttles, turntables, and either pallets or comb-type transfer devices. Because no aisles, ramps, or pedestrian clearances are needed inside the storage volume, these structures fit substantially more vehicles into the same footprint than a conventional ramp garage. Control is handled by programmable logic controllers coordinating drive motors, position encoders, and safety interlocks, with light curtains and profile scanners confirming that the transfer cabin is clear of people before a cycle starts. Retrieval time, throughput during peak periods, and behavior during a power failure are the design constraints that most often determine system layout.

Vehicle-Side Parking Automation

On the vehicle side, automation progressed from parking assistance, in which ultrasonic sensors measure a gap and the electric power steering executes the steering while the driver controls the brake, to fully automated valet parking, in which the vehicle drives itself between a drop-off point and a space with no occupant aboard. Automated valet parking is generally treated as an SAE Level 4 function restricted to a mapped and supervised facility, and that bounded operating domain is why it reached commercial approval ahead of Level 4 driving on public roads: German regulators authorized a Bosch and Mercedes-Benz system for driverless operation in a Stuttgart Airport garage in 2022. Responsibility can sit with the vehicle, with infrastructure that senses the facility and issues trajectories, or with a cooperative split between the two. Because the system operates unoccupied, safety validation is demanding, and work such as the Springer study on the validation of automated valet parking addresses functional safety under ISO 26262 together with the safety of the intended functionality framework in ISO 21448.

Sensing, Guidance, and Space Detection

Space-level occupancy detection uses magnetometers, infrared and ultrasonic proximity sensors, inductive loops, or fixed cameras with vision-based classification, and the results are aggregated over a wireless sensor network or a low-power wide-area link. An early survey of smart parking systems and sensors laid out the node functions and network topologies that this class of deployment uses, and a later survey of IoT-driven smart parking management covers cloud aggregation, mobile applications, reservation, and dynamic pricing. Vehicle-side perception adds surround-view cameras, ultrasonic arrays, and increasingly lidar for free-space estimation and parking-slot marker recognition.

Applications

Automated parking has applications in areas including:

• Dense urban and mixed-use development where land area is constrained
• Airport, hospital, and stadium facilities with sharp demand peaks
• Residential and hotel garages using mechanical storage systems
• Municipal on-street occupancy monitoring and dynamic pricing
• Advanced driver assistance features in passenger vehicles
• Fleet and car-sharing depots that stage vehicles without drivers