Five local authority areas: Wrexham, Swansea, Merthyr Tydfil, Newport and Cardiff, were invited to develop their plans further.
Gwahoddwyd pum ardal awdurdod lleol: Wrecsam, Abertawe, Merthyr Tudful, Casnewydd a Chaerdydd, i ddatblygu eu cynlluniau ymhellach.