for those who couldn't be arsed to take the link (above):
The term multi-storey car park is used in the United Kingdom, Hong Kong, Singapore and many Commonwealth of Nations countries. In the western United States, the term parking structure is used, especially when it is necessary to distinguish such a structure from the "garage" in a house or an automobile service station. In some places in North America, "parking garage" refers only to an indoor, often underground structure – outdoor multi-level parking facilities are referred to by a number of regional terms:
* Parking structure is used in the Western United States and by civil engineers;
* Parking deck is used in the Southeast;
* Parkade is used in Canadian English; it is a portmanteau of parking and arcade;
* Parking ramp is used in the upper Midwest, especially Minnesota and Wisconsin, and has been observed as far east as Toledo, Ohio and Buffalo, New York.[EA]
