Map of G.W. Signalboxeshttp://www.svrsig.org/gwmap/GWMap.htm
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| Sxxxx number | Signal Box name | View on map square | Other information including SRS diagram number |
| S1685 | Brandy Bridge | Map DH203 SO054048 | SRS diagram P155 |
| S2311 | Cefn Coed | Map DG206 SO030079 | SRS diagram W75/11 |
| S1776 | Cwm Bargoed Station | Map DL203 SO086061 | SRS diagram not available |
| S2333 | Dowlais (Central) No. 1 Junction | Map DI205 SO065085 | SRS diagram not available |
| S2334 | Dowlais (Central) No. 2 Junction | Map DI205 SO065083 | SRS diagram not available |
| S1777 | Dowlais Junction | Map DJ204 SO067069 | SRS diagram not available |
| S1778 | Dowlais Station | Map DJ204 SO073078 | SRS diagram not available |
| S2331 | Dowlais Top Station | Map DJ205 SO079083 | SRS diagram D301 |
| S2329 | Fochriw Station | Map DL203 SO104055 | SRS diagram D301 |
| S1768 | Merthyr Station (G.W.) | Map DH204 SO051057 | SRS diagram P155 |
| S2309 | Morlais Tunnel Junction | Map DH208 SO056100 | SRS diagram D349 |
| S2332 | Pant Station | Map DI207 SO060098 | SRS diagram D417 |
| S2315 | Pontlottyn | Map DN204 SO118061 | SRS diagram P276 (pre-1939, c. 1945) |
| S2308 | Pontsticill Junction | Map DI209 SO062121 | SRS diagram D417 |
| S1767 | Rhydycar Junction | Map DH203 SO051051 | SRS diagram D530 |
| S2316 | Rhymney | Map DN205 SO111075 | SRS diagram P276 |
| S2337 | Rhymney Bridge (L.M.S.) | Map DM207 SO105096 | SRS diagram not available |
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