There are an estimated 600 million cars in the world, a figure that's rapidly growing, especially in China and other "emerging markets".
http://www.bbc.co.uk/news/magazine-17271118Interesting facts:
The world's first parking lot is believed to have been built in 1917 in Los Angeles by a young Italian immigrant, Andrew Pansini.
The following year the La Salle Hotel in Chicago built the first parking garage on multiple levels.
I'd like to go and see this one. AlanHo - as it is near you have you seen it:
The Cube, an office and apartment development in Birmingham, opened in 2010 and has installed an automated parking system which allows cars to "park themselves