Pyle West Junction to Fishguard Harbour (WRSD01)
Blaenycwm to Briton Ferry (WRSD02)
Cwmdu to Aberavon Town (WRSD03)
Whitworth Branch (Oakwood G.F. to Tonmawr G.F.) (WRSD04)
North Rhondda (Glyncorrwg) to Cymmer General (WRSD05)
Margam East to Port Talbot (Duffryn Junction No. 1) (WRSD06)
Margam Moors to Margam Abbey Works East (WRSD07)
Copper Works Junction to Port Talbot East (WRSD08)
Cefn Junction to Port Talbot Docks (No. 7 Grid) (WRSD09)
Court Sart Junction to Morlais Junctiob (Swansea District Line) (WRSD10)
Grovesend Colliery Loop to Hendy Junction (WRSD11)
Glyn Neath (Rhigos Colliery) to Neath General West (WRSD12)
Brecon to Neath Riverside (WRSD13)
Colbren Junction to Ynisygeinon Junction (WRSD14)
Neath Junction (G.W.) to Swansea South Dock (WRSD15)
Jersey Marine Junction North to Jersey Marine Junction South (WRSD16)
Dynevor Junction to Jersey Marine Junction South (WRSD17)
Dynevor Junction to Cardonnel Junction (WRSD18)
Neath Junction (R. & S.B.) to Neath Canal Side (WRSD19)
Skewen East to Lonlas Junction (WRSD20)
Landore to Swansea High Street (WRSD21)
Swansea Loop East to Swansea Loop West (WRSD22)
Felin Fran West to Hafod Junction (WRSD23)
Swansea High St. to Swansea Wind Street Junction (WRSD24)
Felin Fran East to Clydach-on-Tawe North and Daren Colliery (WRSD25)
Cockett Station to Cockett Goods Yard (WRSD26)
Brynamman East to Swansea (St. Thomas) (WRSD27)
Clydach-on-Tawe South to Upper Bank Junction (WRSD28)
Yniscedwyn Branch (Gurnos Junction to Clayphon Goods Wharf) (WRSD29)
Caelliau Junction to Brynhenllys Colliery G.F. (WRSD30)
Builth Road (H.L.) to Swansea Victoria (WRSD31)
Llandilo to Carmarthen (Abergwili Junction) (WRSD32)
Gulston Siding (Mountain) Branch (WRSD33)
Brynamman West to Pantyffynnon (WRSD34)
Gwaun-cae-Gurwen to Garnant (WRSD35)
Abernant to Gwaun-cae-Gurwen (WRSD36)
Pontardulais (Junction Station) to Llanelly (Llandilo Junction East) (WRSD37)
Llandilo Junction East to Llanelly Dock (WRSD38)
Dafen to Llanelly Dock (WRSD39)
Cross Hands to Llanelly (WRSD40)
Cwmmawr to Burry Port (WRSD41)
Sandy Gate Junction to Burry Port (WRSD42)
Kidwelly Junction (B.P. & G.V.) to Kidwelly (M.L.) (WRSD43)
Kidwelly to Kidwelly Tinplate Works (Mynydd-y-Garreg Branch (WRSD44)
Lando R.O.F. Branch (WRSD45)
Carmarthen Junction to Bryn Teify (Excl.) (WRSD46)
Carmarthen Station to Carmarthen Bridge (WRSD47)
Pencader to Newcastle Emlyn (WRSD48)
Lampeter to Aberayon (WRSD48a)
Whitland to Pembroke Dock (WRSD49)
Hobbs Point Branch (WRSD50)
Pembroke Dockyard Extension Railway (WRSD51)
Whitland to Cardigan (WRSD52)
Clarbeston Road to Neyland (WRSD53)
Johnston (Pem.) to Milford Haven (WRSD54)
Letterston Junction to Letterston (WRSD55)
Letterston Junction to Trecwn Sidings (WRSD56)