Fel rwyf eisoes wedi dweud, bydd toiledau'n cael eu cadw ar fwrdd trenau hen a newydd.  Ar y cerbydau Metro newydd a fydd yn cynnig gwasanaeth 'cyrraedd a theithio' heb ris rhwng y trên a'r platfform ar leiniau Cwm Taf a'r Ddinas (h.y. gwasanaethau i Ferthyr, Aberdâr a Threherbert), yr amser teithio hiraf i doiled sy'n hygyrch i bawb yw 14 munud, ac ar 95% o'r teithiau, 10 munud.
As I have said previously, on-board toilets will be retained on all new and existing trains.  On the new Metro Vehicles which will operate a turn up and go service featuring level boarding on the Taff Vale and City lines (i.e. services to Merthyr, Aberdare and Treherbert), the maximum travel time to a universally accessible toilet will be 14 minutes, with 95% of journeys being within 10 minutes.