Cafodd y gorsafoedd, sy'n gwasanaethu'r Canolbarth a'r Gorllewin, y Gogledd a'r De-ddwyrain, eu hargymell gan grŵp diwydiant rheilffordd Cymru a'r Gororau. Mae'r cynlluniau hyn yn ychwanegol at bedwar yr ymrwymwyd iddynt yn y gorffennol ond a gafodd eu gohirio gan Lywodraeth y DU.
The stations, which cover Mid and West Wales, North Wales and South East Wales, were recommended by a Wales and Borders railway industry group and are in addition to four previously committed-to schemes which were deferred by the UK government.