O dan y cynlluniau gwario presennol mae Llywodraeth Cymru wedi cyfrifo bod y tanwariant ar reilffyrdd Cymru rhwng 2001 a 2029 tua £2.4bn. Mae hynny’n amcangyfrif ceidwadol, a gallai’r ffigur fod mor uchel â £5.1bn.
The Welsh Government has calculated that under current spending plans, a conservative estimate of the underfunding of Welsh railways from 2001-2029 is £2.4bn, and this figure could be as high as £5.1bn.