This could turn into a pretty stimulating topic:
It might be noted that until "ubiquity" railroading (loose cars, siding-to-siding service, to summarize - anything, in any quantity, from anywhere, to anywhere) began to deteriorate after World War II, the rail carriers had a lot bigger share of the market as a whole, and the more sensitive traffic, merchandise, LCL, forwarder, perishables, livestock, etc. was, of course, the stuff which contributed the most toward the "overhead" -- maintenance, property taxes, etc. That traffic was the first to be lost to highway competition, which reduced revenue. which required service cuts, etc, and the vicious cycle began.
Probably the only thing that halted the slide was the recognition by all the major players -- Class I's, labor unions, Wall Street, governments at every level, even academics -- that if a drastic restructuring was not undertaken, the entire system would be nationalized -- run from there on out by the rules of a bureaucracy, rather than an enterprise. But somehow, the right pieces fell into place, and six or seven major players (depending upon who's counting) backed up by a "second team" of short-lines, regionals and some entities on the border between the public and private sectors, put together something that works.
Some of us at this site, which I used to refer to as "our little Parliament", have been watching the game for fifty years or more; some others are too young to remember some of the things we've lost that made the earlier times so interesting. But the point is that the basic technology behind it has endured, and holds tremendous potential.
Personally, I suspect that no major change will come until after the completion of PANAMX; that might divert a lot of transcontinental traffic to places like Savannah and Hampton Roads (NS appears to be anticipating this) AND free up some capacity on the big 2-main-track, bi-directional western main lines where capacity (and the safest, most-efficient way to expand it) has been an emerging issue. Under those conditions, some even bigger infrastructural underpinning, with public-sector consent and participation, seems inevitable (There's a thread somewhere here called "If I Had a Billion" that might interest a few people as well). Any number of experimental marketing strategies, like the stillborn Reading "Bee-Line Service'" (ironically, immortalized on one of the NS Heritage units) might re-emerge someday. All the tools, and more leverage within the public sphere, are there, and that is sufficient.
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It's been forty-five years since I was an undergraduate majoring in Business Logistics, and dabbling in Transport Economics and libertarian activism on the side. In those days, no one thought of freight railroading as a growth industry. That idea is no longer
en vogue.