Amey have costed proposals for changes to the infrastructure to enable the upgraded service
Level crossing upgrades: £1M
Passing loop on the Melksham branch: £5-10M
Junction remodelling at Thingley: £1-2M
New (reinstated) west-facing bay platform at Chippenham: £2-5M
New (reinstated) platform at Westbury: £2-3M
Rolling stock capital outlay: £0.5-1M
Stabling facilities at Westbury (e.g.): £0.5M
New passing loop and platform at Frome: £5-10M
Total: £20-30M