I linked to Streetsblog because they have a good synopsis for those who don’t want to read the whole report (linked in the article). Here’s a key quote:

“There was a 35-year parking coma during which the federal government, cities, and environmentalists forgot why parking was important,” said John Kaehny, who co-authored the report with Matthew Rufo and UPenn professor Rachel Weinberger. “This study shows people are starting to wake up and understand that parking is one of the most important influences on how cities work and what form of travel people choose to use.”