That reminds me, I just saw a story on Nightline or Dateline about countries in Europe and how they're dealing with the rise in gas. Basically, they mentioned how it wasn't much of an issue since the majority of their citizens ride public transportation or use bikes to get around town; either because of street regulations, incentives, or geographical convenience. It was funny because at the end they were interviewing someone on a bike in the middle of town and he made a smug remark saying: "I bet your SUV can't get this mileage." while he rode off ringing his lil bell..
You could say that the reason why we haven't adopted similar systems in our metropolitan areas is our difference in lifestyles. I could come up with various other reasons myself, concerning greed and corruption, but that doesn't matter now at this point. America's energy needs and dependency on oil will only get worse as our likely future presidents have no plan to make any changes that will take the power out of the hands of oil corps or place a carbon tax to force alternative fuel investments. People will just adapt and forget about the past when gas was a normal commodity instead of a luxury when it climbs to $5.00+ a gallon.