Here's my post with a couple of ideas i came up with back in June - Also partly discussed in this thread:
http://www.railforums.co.uk/showthread.php?t=33950&highlight=devon
http://www.kilbridegroup.com/docs/view_news.asp?nid=49
And of course, whilst there is the current Plymouth to Bere Alston & Meldon to Exeter sections, not only would the missing link be the most expensive part, but you would also have to by-pass some parts of Tavistock, and then upgrade the 2 branches in-between...unless it was to be built as a Single Track mainline...
The way i see things, it should be designed and built like this:
Double track all the way from Exeter St Davids to Meldon...
Single tack with Bi -Di signalling from Meldon to Tavistock with at least 1 or two 'Dynamic Loops' with a station at Lydford (on the loop)...
Meeting up with as much Double track from Tavistock back to the junction at St Budeaux, with a rebuilt St Budeaux Victoria Road station...
With local services provided by First great western, and South West Trains running Waterloo to Plymouth services, maybe calling at:
Exeter St Davids,
Crediton,
Yeoford?
Sampford Courtenay,
Okehampton,
Tavistock
Bere Alston,
St Budeaux Victoria Road
Plymouth
And the Gunnislake Branch:
Gunnislake to Tavistock Shuttles with a 153, Tavistock could also be served by a Plymouth Metro - How about looking into re-opening a station near enough to the old Southern station of Plymouth Friary?
Since the ceasing of the oil traffic, the branch from Laira doesn’t receive much use nowadays, and it is after all closer to the Marina side of the city...
So, you could have a Plymouth Metro service operated with say a pairs of 143s/ 150s, Calling at:
Friary,
Plymouth North Road,
Devonport,
Dockyard,
Keyham,
Victoria Road,
Bere Ferres,
Bere Alston,
Tavistock.
Anyway, here’s a FGW Style map I’ve produced...
And whilst BARS / Devon & Cornwall Railway are to start running from Okehampton to St James's Park, the route would also make a great diversionary route from Dawlish & the South Devon mainline for when Engineering works are on, or when the sea wall is closed etc...Whilst opening up a competitive way to get to London from Plymouth & vice versa...
http://ronstruttsrailwaypics.fotopic.net/c1215638.html
Just an idea...But then again & at the end of the day, most of it is never likely to happen...because naturally it all costs loads of...
£ £ £ £ £ £ £
As for the second route option - Exeter to Newton Abbot via Heathfield - Unfortunately, i cannot see any chance of seeing the Teign Valley Line re-opened again...
Why? Because it was largely a single track route with several steeply graded sections, serving only a handful of small villages no doubt better served by Devon General buses, With Several fairly sharp curves on route and as usual, several sections of the route have been built over - the A38 for example uses part of the route from Heathfield to Chudleigh – so although it could still provide a connection to Torquay, Paignton & Dartmouth, I really can’t see the rebuilding and reopening not only ever becoming feasible, but generally re-opening again – All that remains of the route is a short route from Newton Abbot to Heathfield & a short branch to Sims Metal Management Exeter / recycling / scrap yard…
But if the ex Southern Railway route from Exeter to Plymouth were to reopen, hopefully it would as above, with Continuous Welded Rails on steel sleepers, designed and built with higher speeds in mind – 75 to 90 where possible…