In its manifesto for the upcoming Senedd election, Plaid Cymru has pledged to create a "western coast rail link" connecting Bangor and Caerfyrddin.
The plan would entail reinstating the Caerfyrddin to Aberystwyth and the Afon Wen to Bangor railway lines— both of which were axed during the 'Beeching Cuts'.
Plaid Cymru says that its western coast rail link would deliver "a broad range of economic, environmental, social and cultural benefits."
The rail project ties into the party's broader vision for a western coast region called 'Arfor', which aims to develop the economy of the Welsh-speaking west.
The manifesto says that the western coast rail link "will strengthen the long-term sustainability of communities, businesses, and public institutions, for example the universities in Lampeter and Aberystwyth."
In addition to the creation of the western coast rail link, the party's manifesto also pledges to create a Valleys CrossRail that will connect Treherbert in the Rhondda to Pont-y-pŵl, via Pontypridd, Nelson (Ffos y Gerddinen), Ystrad Mynach, Hengoed, Blackwood (Y Coed Duon), Newbridge (Trecelyn), and Crymlyn.
The party says that the scheme will "benefit more than 250,000 people, with a focus on economic and business development and urban regeneration."