Last update 11 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 end on junction with SDI1 (208.49) 0.50 Lonlas sidings 1.08 Lonlas Junction with SDI3 1.64 Felin Fran? viaduct and intersection bridge over SVL (mileage unknown) 2.10 FELIN FRAN 2.15 original Felin Fran East Junction with PWE (0.00) 2.25 relocated Felin Fran East Junction with PWE (0.10) 2.70 Felin Fran West Junction with CYZ (0.00) 2.71 River Tawe viaduct 2.79 Felin Fran West Junction with MOR (3.21/3.29) 3.25 start of Morriston viaduct 3.33 end of Morriston viaduct 5.66 LLANGYFELACH 8.03 PONT LLIW 9.33 Gorseinon Goods Junction with Grovesend Chord Line (1.10) 9.73 start of Loughor viaduct 10.04 end of Loughor viaduct 10.05 Morlais East Junction with HDY (0.00) 10.64 Morlais Junction with LLA (3.49)