Pam y caewyd llinell Treherbert am 10 mis pan oedd Trafnidiaeth Cymru yn gwneud gwaith gyda'r nos yn bennaf, ac a wnaiff yr Ysgrifennydd Cabinet ddarparu cofnodion o'r gwaith a wnaed ar y llinell hon a'r adeg o'r dydd y cafodd ei wneud?
The transformation of the Treherbert Line required the complete replacement of the signalling system and it was not possible to operate any passenger services on the line until it was fully commissioned. Full access to the track over the nine-month closure period allowed Transport for Wales to carry out the transformation in the shortest possible timescale.
The majority of transformation works were completed in the daytime with some night works necessary to achieve the planned schedule.
I have asked TfW to provide you with full details of the work which was carried out on the Treherbert Line during this period.