Last update 4 June 2026
Mileages are given in the form miles.chains unless stated otherwise. Figures prefixed with ≈ are approximate, those in parentheses are not on this route but are given for reference. Reference to 'start'/'end' of an asset are as read down the page.
0.00 Gelli Tarw Junction with VON (24.58) 0.59 LLWYDCOED 1.08 Dylass sidings 2.29 Blaenant sidings 2.34 Abernant viaduct 2.42 ABERNANT 3.13 Werpa 5.02 Abernant Tunnel East/Abernant Line Junction with ABL (5.72) 5.30 Joint Line Junction with QYZ (5.75) 5.40 junction with QYZ (6.05) 5.59 Rhydycar Junction with MJR (23.56) 5.61 start of Merthyr viaduct 5.70 Mardy Junction with CAM (24.19) 5.77 end of Merthyr viaduct 6.22 MERTHYR TYDFIL Note that 5.70-6.22 is now part of CAM (24.19-24.51)