Not surprised considering the amount of signal and gate boxes there were on the Southport line. There must have been thirteen of them.
Given enough boxes, absolute block can sustain a very intensive service. The resignalling included a small amount of rationalisation but the present arrangement is relatively well designed and can more than cope with the level of service. Power supply capacity seems to be more of a limitation.
How does splitting "existing traffic flows" between different routes, with duplicated costs of maintenance, signalling etc make anything "inherently profitable"?
Surely spreading the same income across increased costs reduces profitability?
We understand that you are convinced Beeching "got it wrong" and that you believe many of the closed lines should have been retained but given the level of subsidy much of the existing network requires it's hard to believe any significant proportion of those routes would now break even, never mind be "profitable".
Existing traffic flows across all modes, not necessarily splitting existing rail traffic, although doing this may increase profitability of lesser used routes it will decrease profitability of heavily used ones.
Any line capable of braking even should have been retained if the case for closure was financial since even the most essential service would overall cost nothing to run. Many reopening proposals include business cases on the basis that new services would require no increased subsidy to run.
That wasn't the basis for closure. As we've already noted, many lines were closed before the 60s, some after, and some were slated for closure, then reprieved, then closed. Point is, closures happened over a long time, over several decades in fact, from right back in the 1920s up to the early 1980s. Beeching was obviously the peak of that trend, but it wasn't like Beeching suddenly came in and started ordering closures out of the blue. He may have put his foot on the accelerator, but he didn't change the course the railways were already taking.
The last few closures e.g. Woodhead and March - Spalding very much happened in the early 1980s, but then the tide then very much turned with the failed closure of the Settle - Carlisle and from then on further closures were impossible to justify. By the late 1980s, lines had started to reopen with the Thameslink core, Oxford - Bicester Village, Swindon - Trowbridge, Kettering - Corby, Coventry - Nuneaton and Walsall - Hednesford to name a few. If the accelerator had not been pressed in the 1960s, many more lines may have survived to see the time when they could not be closed, or more trackbeds may not have been sold off and built on.
Being a duplicate route doesn't make a line inherently profitable. Look at the current lines that fit your description. Is the Reading-Taunton line inherently profitable? The West of England line?
The WCML and Settle-Carlisle are a classic case in point. The northern WCML from Lancashire to Carlisle is heavily congested, with all sorts of timetabling compromises having to be made to allow freight to run. According to your theory, it should be 'inherently profitable' to move the freight trains onto the Settle-Carlisle (via Blackburn and Clitheroe) and reduce congestion, improve reliability etc. But it hasn't happened. Because it's actually cheaper and more economical to upgrade the WCML instead.
Not that I'm advocating we close these lines. Far from it. I recognise the important social and potential strategic role these lines can play. But let's not pretend they are actually earning money for the railway.
Say all Reading - Taunton and West of England line traffic was diverted via Bristol Temple Meads and duplicate lines closed (ignoring the intermediate destinations which would be unserved) would the main GWML timetable then become unworkable due to unavoidable congestion which is relieved by the other lines? The West of England line should continue to Plymouth and Bude beyond Exeter (at least it, but not through services to Waterloo, has now been extended back to Okehampton) but the existing network provides a number of diversionary routes for services to the South West to use in cases of disruption, as demonstrated by the 150 which ran from Exeter to Reading via Trowbridge and Melksham recently.
The congested WCML can be upgraded but only to a point. North of Preston is of course only 2 tracks and I don’t believe much of it was ever quadrupled. Taking a fast passenger off the WCML and running it via Blackburn and Clitheroe should free up more capacity for freight on the WCML than putting freight on the Settle - Carlisle does, but then the problem becomes that the Settle - Carlisle and wider Midland Main Line hasn’t been upgraded to the same standard as the WCML, making either that or quadrupling the WCML very expensive. I think the biggest impact at this point would be to requadruple Wigan - Euxton.
That's a veritable smorgasbord of lines. I agree with some but others, no. Why Clapham-Lowgill? Because S&C and Bentham lines are already so busy? And what sort of level of service would you put on Garsdale-Northallerton?
Clapham - Lowgill is a strategic route because the Settle - Carlisle can’t have the capacity for all trains that have come from Blackburn and Clitheroe if some has come from Leeds and Skipton, so some can be sent onto the WCML, which in turn some traffic will have left south of Lowgill including that to Windermere and also fulfils the need to serve Ingleton. Quadrupling just Lowgill - Tebay would then allow traffic from Ingleton to continue to Barnard Castle without creating a bottleneck.
Garsdale - Northallerton is quite a convenient East - West route, but would obviously carry more freight than passenger traffic.
Possibly. Rule of thumb - if there's a busy dual carriageway there's probably a case for a railway on the same corridor. And that's what we have, more or less.
I present to you the A66. If there was a route provided to Ingleton, Hawes or Barnard Castle, the Clitheroe - Hellifield line would suddenly become a lot more useful.