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 |
| Carmarthen Valley Junction | Map BK57 SN631218 | SRS diagram not available | |
| S2219 | Cynghordy (L.M.S.) | Map BP62 SN802407 | SRS diagram S297 |
| S1940 | Devynock and Sennybridge | Map BR59 SN924289 | SRS diagram D527 |
| S2132 | Ffairfach | Map BK57 SN629213 | SRS diagram D40 |
| S2228 | Golden Grove | Map BJ57 SN590210 | SRS diagram not available |
| S2227 | Llandilo Bridge | Map BK57 SN628215 | SRS diagram not available |
| Llandilo North | Map BL58 SN634228 | SRS diagram not available | |
| S2133 | Llandilo South | Map BL58 SN634226 | SRS diagram P139 (Llandilo 1955) |
| S2218 | Llandovery North | Map BN60 SN764346 | SRS diagram B142 (No. 1) |
| S2217 | Llandovery South | Map BN60 SN761342 | SRS diagram S429 (No. 2) |
| S2136 | Llangadock | Map BM59 SN714310 | SRS diagram P139 |
| S2216 | Llanwrda | Map BN60 SN740326 | SRS diagram S801 |
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