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SRenNew technology is almost always beyond the reach of the market place at the time it is discovered.  They key to making it affordable is acceptance and mass production, which almost always lower dramatically the cost.  The first computers were so expensive and labor intensive that only the U.S. Army and a few research centers could afford them.  But the cost came down and, ultimately, they became available for the masses.I have been a pilot and student of aviation for decades.  I never read anything to suggest that the early aeronautical engineers envisioned anything like the Boeing 747.  Or that airplanes would supplant trains as the preferred mode of travel, especially over long distances.The comparison between pre-Wright understanding of flight and Intelligent Highway Systems was illustrative.  It is about a vision of the possible.  Many if not most of the great inventions came from people who defied the conventional wisdom.  They did not root themselves in old technologies; they envisioned a new way.  So it could be with Intelligent Highway Systems in select locations.Some experts say that we are near the peak of oil production.  Others say we are 40 to 60 years away.  No one knows for sure.During the Stone Age there were probably men and women who believed that the world was running out of stones.  Fortunately, people with greater foresight discovered better alternatives.  And they made the switch to them before the supply of stones was exhausted.  The era of cheap oil is over, and we will switch to other fuels long before the world runs out of oil.  Hopefully, we will do it in a rational and thoughtful manner.The U.S. needs to invest in public transit, including rail, where it makes sense, which for the most part is in large cities and relatively short, high density corridors.  But for most parts of the U.S., better alternatives exist or will be developed.  In Texas less than two per cent of the population uses public transit.  And it is likely to stay that way for a long time to come.  How do I know?  I don't for sure.  But two of my neighbors, good old truck loving boys, just bought Smart Cars.  They are not going to take a bus or a train to work.
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