Article I found on the net, thought interesting. For those right leaning people, relax, it's just a liberal propaganda.
A little sample...
"In built-up areas of the country, we devote more land to our cars than to our homes, wrapping the nation in 38.4 million acres of roads and parking lots, a vast blanket of concrete as big as Rwanda.
Number of bikes that fit in one car parking lot space is 14. "
http://www.self-propelled-city.com/facts.html