There has been a growing movement within the New Urbanist scene to retrofit car-oriented suburbs. There is even an excellent book on the subject titled Retrofitting Suburbia by Ellen Dunham-Jones. The book focuses primarily on retrofitting aesthetically unappealing, car-oriented suburbs that were built in the 2nd half of the 20th Century.
Despite opposition from suburban NIMBYs this idea makes practical and aesthetic sense. Your typical American suburban commercial thoroughfare is lined with ugly strip malls with massive parking lots that are aesthetically unappealing, ecologically unsustainable, and unfriendly to pedestrians.