Part of the reason there are no other alternatives is because, from the inception of road transport (essentially, after WWII), railways have been hobbled and handicapped by all kinds of regulations. Not to mention a smattering of corruption - the Transport Minister who presided over the Beeching cuts was one Ernest Marples. Admittedly, he did resign his holdings in the Marples Ridgeway construction company (which built the M1

), but as far as I know he handed them over to his wife...
The Beeching cuts destroyed the capillaries of the railway network - lines that went, if not to villages, at least to small towns. Which meant that, for most of the country, the distance to the nearest railhead was now too great to make it worthwhile putting the stuff on rail again. That equation will change as oil continues to get more expensive, but if we aren't reinstating some kind of alternative NOW, then we won't have any meaningful options when we really need them (which is, in a way, NOW).
I'm not advocating some absolutist "trains good, roads bad" policy; I'm not that naive. But we don't need convoys of 44 tonne lorries all going the same way when the same goods could have been put onto rail, delivered to railheads much nearer their destination, and then transported the short remaining distance on smaller vehicles.
Let's suppose a nightmare scenario. Oil's $500 a barrel. Too expensive, in reality, to spend on carting spuds to Shrewsbury, or cauliflowers to Chester. We have to get stuff around the country some other way. At the moment, there isn't really another way: we're utterly dependent on oil.
But suppose we started - today - sorting out a transport network that wasn't dependent on oil. Realistically, that probably means nuclear: there will never be enough biofuels to meet even current demand. Obviously nuclear-powered 44-tonne trucks aren't an option (remembering that even uranium is a comparatively scarce resource), so we need an alternative energy source.
Most of them pretty comprehensively rule out road transport - battery technology still isn't there yet, and even hydrogen power's a way off...perhaps it'll work by then. But we have proven, working technologies now with railways. Almost all of France's railway network is powered by electricity (mostly nuclear-generated), for example. But that stuff doesn't build itself, so we need to be dealing with it now. And working out what kind of railway infrastructure we need to make it practical and cost-effective to deliver goods to where they're needed when road transport is costing a fiver a mile. Maybe having railheads in every market town in the UK doesn't make any economic sense right now, but when in the cost equation
will it make sense...and will it be all that far in the future? Will we even have time to build it if we start now?
Railway economics suck: upfront infrastructure costs are huge, there's no denying it. A railway locomotive costs a lot more to build than several dozen HGVs But once it's built (if it's built properly), you've got it for the next 40 years. We're still using railway infrastructure that was built over 150 years ago - so we're looking at paybacks on that kind of timescale. If the Victorians were doing it, albeit sometimes for all the wrong reasons (what's the name of that viaduct-to-nowhere in the middle of Birmingham?

), then we can manage rather better, surely, than the scratching in the dirt we seem to be managing right now...
Oh, and, incidentally, if we're building a railway for freight, there's always the possibility of letting passengers use it, too. And, for that matter, perhaps combining the small-unit-load distribution network with local public transport, too. After all, we want to get as much back for that fiver-a-mile fuel bill as we possibly can, no?
It makes such sense to me, I find myself dismayed by the way governments simply refuse to take a strategic view. This government's policy on rail power? Don't electrify: use biofuels. It's a short-term sticking-plaster way of, effectively, doing nothing. Or, more importantly, spending nothing. Which isn't a lot different from how Thatcher's government operated British Rail, and look where that got us.