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[quote user="ICLand"] Let me expand that a little: mph/energy use index 10         1 50       14 100    197 150    358 200    570 250    832 300   1143 Kind of a "wow," set of numbers, but, the HSR would only have to carry 14 passengers to equal the energy efficiency of 14 people using their individual cars to travel 300 miles. A car and a trainset are a little bit of apples and oranges in this comparison, and so this is very, very rough, but I suppose there is a limited economic argument. [/quote] I don’t understand how you arrived at that conclusion.  Wouldn’t you need to calculate the energy needed to move the train carrying 14 people, and the energy needed to move 14 automobiles with one person in each?   <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p> Moreover, this contention that HSR will emit more CO2 than cars per passenger is predicated on true HSR running the maximum state-of-the-art speeds for such trains, say 250-300 mph or so, versus cars running the conventional highway speed limit.  That is the reason for the agument to run HSR slower than the maximum.    But even if the train and the automobiles were both running say 60 mph, I cannot imagine how the train carrying 14 passengers with its gross weight of several hundred tons could possibly use less energy than 14 people each driving a 1.5-ton car.  I realize that the train has less friction, but still.
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