Plinky asked, "If public transportation were available in your neighborhood, would you use it?"
I do use it! It's much cheaper than maintaining a car, when you consider the cost of insurance, gas, upkeep, etc. For those of us who don't care to drive (or whose health removes driving as an option at times) or who want to “go green,” public transit is a very important resource.
I only wish MARTA (Metro Atlanta Rapid Transit something) were extended to cover all of metro Atlanta. Right now, it is really only a viable option for reaching a small portion of the metro area.