Interesting facts:
• Parking lots tend to be sources of water pollution because of their extensive impervious surfaces. Virtually all of the rain (minus evaporation) that falls becomes urban runoff. To avoid flooding and unsafe driving conditions, the lots are built to effectively channel and collect runoff. Parking lots, along with roads, are often the principal source of water pollution in urban areas.
• In Sweden, there are legally two types of car parking, either on streets and roads, or on private land. A parking violation on streets is a traffic crime, giving fines. A parking violation on private land (also if owned by the city) is a contract violation and gives additional parking fee (Swedish: kontrollavgift = check fee). The difference is small for the car owner and is always responsible.
• In the United Kingdom it has been possible to pre-book parking with specialist companies, such as BCP, since 1978. This is prevalent at all airports, major ports and in city centres.