page_title: Parking lot
section_title: Technology
hierarchical_section_title: Parking lot / Technology
caption_attribution_description: English: The device at each lot at this car park detects if a car is present directly beneath it. This helps to determine the number of available lots at a particular section or level.
context_page_description: A parking lot or car park, also known as a car lot, is a cleared area that is intended for parking vehicles. Usually, the term refers to a dedicated area that has been provided with a durable or semi-durable surface. In most countries where cars are the dominant mode of transportation, parking lots are a feature of every city and suburban area. Shopping malls, sports stadiums, megachurches and similar venues often feature immense parking lots. See also multistorey car park.
  Parking lots tend to be sources of water pollution because of their extensive impervious surfaces. Most existing lots have limited or no facilities to control runoff. Many areas today also require minimum landscaping in parking lots to provide shade and help mitigate the extent of which their paved surfaces contribute to heat islands. Many municipalities require a minimum number of parking spaces, depending on the floor area in a store or the number of bedrooms in an apartment complex. In the United States, each state's Department of Transportation sets the proper ratio for disabled spaces for private business and public parking lots.
context_section_description: Modern parking lots use a variety of technologies to help motorists find unoccupied parking spaces using parking guidance and information system, retrieve their vehicles, and improve their experience. This includes adaptive lighting, sensors, indoor positioning system (IPS) and mobile payment options. The Santa Monica Place shopping mall in California has cameras on each stall that can help count the lot occupancy and find lost cars.
  In outdoor parking lots, GPS can be used to remember the location of a vehicle (some apps saves location automatically when turning off the car when a smartphone breaks communication with a vehicle's Bluetooth connection). In indoor parking lots, one option is to record one's Wi-Fi signature (signal strengths observed for several detectable access points) to remember the location of a vehicle. Another alternative is to use smartphone applications that does inertial dead reckoning, detection of turns made by the car while driving indoor, correlations of travel time between turns, and machine learning algorithms, to infer the rough location of the parked car based on a map or floorplan. 
  Online booking technology service providers have been created to help drivers find long-term parking in an automated manner, while also providing significant savings for those who book parking spaces ahead of time. They use real-time inventory management checking technology to display parking lots with availability, sorted by price and distance from the airport.
  There are mobile apps providing services for the reservation of long-term parking lot spaces similar to online or aggregate parking facility booking services. Some long-term parking mobile apps also have turn-by-turn maps to locate the parking lot, notably US and UK based ParkJockey.
caption: Sensors above each lot in this indoor parking lot determine if a car has already taken the lot
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