Mae llawer o’r gwaith adeiladu bellach wedi cael ei gwblhau, a’r gwaith sydd ar ôl i’w gwblhau yn gymharol fach. Rhoddwyd newid mawr i’r ffordd mae traffig yn cael ei reoli ar waith ym mis Awst 2020, gan symud yr holl draffig i fyny i'r ffordd uwch newydd ym mhen gorllewinol y cynllun, gan alluogi gwaith i ddechrau ar ailadeiladu ffordd bresennol yr A465 islaw. Ar 7 Rhagfyr 2020 ailagorwyd y ffordd ymuno tua'r gorllewin ym Mryn-mawr, a oedd wedi bod ar gau ers mis Awst 2020, gan adfer mynediad uniongyrchol ar hyd yr A465 ar gyfer traffig sy'n mynd tua'r gorllewin.
Construction is now substantially complete with the scope of work remaining relatively limited. A major traffic management switch was implemented in August 2020 which moved all traffic up onto the new elevated road at the western end of the scheme enabling work to start on the rebuilding the existing A465 road below. On the 7thDecember 2020 we re-opened the westbound on-slip road at Brynmawr which had been closed since August 2020 reinstating direct access along the A465 for traffic heading westbound.