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If you were building railroads from scratch and could pick any gauge you wanted, you'd still pick something very close to what we have now: it's a very good compromise between all the tradeoffs of cost of construction, cost of materials, utility, and efficiency. <br /> <br />Plenty of railroads that are disconnected and newly built in recent years have been able to select any gauge they wanted, and still chose standard gauge, e.g., the Black Mesa & Lake Powell; the iron-ore roads in Australia's Pilbara region. That indicates there was no overwhelming reason to change. <br /> <br />What the writer didn't realize is that freight cars aren't too small, in reality, they're for most shippers too large. Very few shipments justify anything with the capacity of a boxcar, and the trend is toward smaller and smaller shipments to ever more finite endpoints. That's why trucks are so successful.
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