Suggested links to Westbury could be relevant to Trans Wilts? All rather speculative but thought it was worth posting.
Certainly worth posting, and a good chance to document 'passenger trains to Radstock' which (on looking around following your post) seems a bit thin on the Coffee Shop.
Following is E&OE from me - please follow up / let me know of any corrections.BackgroundRadstock is set in the bottom of a valley, largely continuous now with Welton / Midsomer Norton. Historically, a railway line ran along the valley - the Somerset and Dorset passing through on its way from Bath to Poole and Bournemouth. Another line, built as the Bristol and North Somerset Railway, ran from Bristol via Pensford and Radstock to join the Great Western main line from London to the West Country at Frome. Radstock lost its passenger services in 1959 (Bristol to Frome) and 1966 (Bath to Bournemouth). Freight persisted until 1973; Radstock was at the heart of the Somerset Coal Field, with coal leaving via the line to Frome from Lower Writhlington, Braysdown and Writhlington collieries, to transport coal to Portishead power station.
Administratively and economically, Radstock is part of BaNES (Bath and North East Somerset) which is a part of
WECA» (West of England Combined Authority). It is 16 miles from Bristol; 10 miles from Bath; 8 miles from Frome. Public transport if provided by buses, with the major flow being to Bath. Of the three places I mentioned, the travel flow to Frome is by far the lesser, as it's a much smaller town than Bath or Bristol, and is in Somerset (Mendip) which is not part of WECA.
The railway track from Radstock to Frome remains in situ, but could not just be re-opened overnight. See later. Restoration of the line via Pensford to Bristol would be, I think, impractical as the trackbed has been lost. Restoration to Bath would require Coombe Down and Devonshire tunnels - now re-opened as part of a walking and cycling route - to be re-assigned to rail, and there would be a question as to how Bath would be accessed once the trains descended from Devonshire Tunnel. More heavy engineering such as Tucking Mill viaduct might well need to be strengthened and certainly the recurring maintenance costs of a heavily engineered line would need to be taken into account.
So, it appears to me,
the only feasible way of getting a rail service back to Radstock might be the line to Frome, ((see footnote added later)) even though it would take people initially in the opposite direction to the commonest desired destinations, travel to which would be somewhat indirect. This is not necessarily a show stopper, but needs to be factored in; the commonest journey from Melksham by public transport is also to Bath ... and the train doesn't go in that direction, but never the less passenger numbers have done well.
Logistics - Radstock to FromeBuilding works in recent years have cleared and redeveloped the old station site at Radstock, latterly known as Radstock West, but a limited facility could still be provided. But that station would most obviously be positioned at the bottom of a long incline, and still be on a gradient, which would require special measures and / or dispensations to meet modern standards.
I really doubt that the existing track would be serviceable for the first miles and it would need to be relaid; alongside the track is now a public footpath / cycleway and there are a few "pinch points" at which some work might be required to get all modes through.
Near Mells / Great Elm, the operational freight line from Whatley Quarry joins the line and this has a significant traffic of heavy trains which is likely to persist. Knitting in the operation of the freight and the passenger service would require careful planning, and the presence of the freight would probably preclude some light rail options for the final miles into Frome.
The line passes close to the centre of Frome (right behind the Cheese and Grain community centre) where - from the town's viewpoint, a statin would be utterly logically placed; it then joins the loop off the Great Western / West of England line that services Frome, but in a direction 'away from' the current Frome Station. The first current station at which a passenger train from Radstock could reach without reversal is Westbury. A triangle to take a train direct from Radstock to the current From station could not realistically be restored, as it has been built on recently.
Much has been written about the problem of re-instating level crossings in Radstock ... indeed that would be a problem except that the proposal here is to a terminus some distance short of the crossingRe-opening projectsDiscussions of Steam Railway v heritage (diesel) v standard through running to the National network, or indeed a combination of these have gone on, with all sorts of different pulls. Far from unique but the question really has been "why do we want a railway in Radstock"? However, I have been impressed by a lot of the work put in - though not following on a day to day basis; best to refer you to
https://www.northsomersetrailway.com .
From Radstock, intermediate stations at Kilmersdon (home of Jack and Jill; you can walk up their hill), at Mells Road (passing loop and heritage base?), and at Frome (Cheese and Grain) - potential limit of heritage operation. On to Westbury. Question asked "would the train go beyond Westbury". Maybe - there's logic in linking it in with MetroWest local train, for example. Question also asked about linking it with TransWilts. I'm inclined to think not; far better for the people from Radstock to be able to reach Bath and Bristol on a direct train, and far better for the people from Swindon and Chippenham to have a service to Salisbury and Southampton than to Radstock.
Edit to Add - FootnoteI have been reminded of another option to get passenger trains from Radstock. Starting at the old Somerset and Dorset station an taking the trackbed towards Bath. At Midford, this crosses the former Camerton Branch which could be taken tp Limpley Stoke to join the
GWR▸ line from there into Bath. This also puts the track at Radstock into the valley bottom and allows potential extension, once level crossing and access over the heritage operation, through Midsomer Norton and possibly on as far as Shepton Mallett.
I am adding as an attachment a map to this post showing the layout of all the places and lines - huge thanks to Richard Fairhurst for his permission to use his maps in this wy / for out posts - Richard, your maps paint ten thousand words!