| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | ||
|---|---|---|---|---|---|---|---|
| Up | Down | ||||||
| 1 | - | ↓↓ | Cardiff, Bute Road | - | |||
| 2 | ↑ | ↓↓ | Bute Street | 0m 731yds | |||
| 3 | ↑ | ↓↓ | Cardiff Queen St. South | 0m 836yds | |||
| Cardiff Queen St. | |||||||
| 4 | ↑↑ | ↓↓ | Cardiff Queen St. North | 0m 437yds | |||
| 5 | ↑↑ | ↓↓ | Crockherbtown | 0m 1127yds | |||
| 6 | ↑↑ | ↓↓ | Maindy Bridge | 0m 907yds | |||
| 7 | ↑↑ | ↓↓ | Maindy Fuel | 0m 1155yds | |||
| 8 | ↑↑ | ↓↓ | Roath Branch Junction | 0m 1381yds | |||
| Llandaff | |||||||
| 9 | ↑↑ | ↓↓ | Llandaff Loop Junction | 0m 1381yds | |||
| 10 | ↑↑ | ↓↓ | Radyr Junction | 0m 1441yds | |||
| Radyr | |||||||
| 11 | ↑↑ | ↓↓ | Pentyrch Crossing | 1m 132yds | |||
| 12 | ↑↑ | ↓↓ | Walnut Tree Junction | 0m 1501yds | |||
| Taffs Well | |||||||
| 13 | ↑↑ | ↓↓ | Taffs Well Siding | 0m 1667yds | |||
| Treforest Estate Halt | |||||||
| 14 | ↑↑ | ↓↓ | Maesmawr | 2m 973yds | DGL 67 | ||
| 15 | ↑↑ | ↓↓ | Treforest Junction | 1m 231yds | |||
| Treforest | |||||||
| 16 | ↑↑ | ↓↓ | P.C. & N. Junction | 0m 1711yds | |||
| Pontypridd | |||||||
| 17 | ↑↑ | ↓ | Pontypridd Junction | 0m 545yds | |||
| 18 | ↑ | ↓↓↓ | Rhondda Cutting | 0m 341yds | |||
| 19 | ↑↑↑ | ↓↓ | Gyfeillon Lower | 0m 973yds | |||
| 20 | ↑ | ↓↓ | Gyfeillon Upper | 0m 983yds | |||
| 21 | ↑ | ↓↓ | Trehafod Junction | 0m 517yds | |||
| Trehafod | |||||||
| 22 | ↑↑ | ↓↓ | Eirw Branch | 0m 567yds | |||
| 23 | ↑↑ | ↓↕↓↓ | Rhondda Fach Junction South | 0m 1683yds | |||
| Porth | |||||||
| 24 | ↑ | ↓↓ | Rhondda Fach Junction North | 0m 401yds | |||
| 25 | ↑ | ↓↓ | Naval Colliery Junction | 1m 325yds | |||
| 26 | ↑↑ | ↓↓ | Dinas Rhondda | - | |||
| Tonypandy and Trealaw | |||||||
| 27 | ↑↑ | ↓↓ | Pwllyrhebog | 0m 1359yds | |||
| 28 | ↑ | ↓↓ | Llwynypia | 0m 1408yds | |||
| 29 | ↑ | ↓↓ | Gelli | 1m 0yds | UGL 70 | ||
| 30 | ↑ | ↓↓ | Maendy | 0m 1188yds | |||
| 31 | ↑ | ↓ | Ystrad | 0m 396yds | |||
| 32 | ↑ | ↓ | Cwmparc | 0m 1364yds | UGL 59 | ||
| Treorchy | |||||||
| 33 | ↑ | ↓↓ | Treherbert South | 0m 2970yds | |||
| Treherbert | |||||||
| 34 | ↑ | ↓ | Treherbert North | 0m 154yds | |||
| 35 | ↑ | ↓ | Rhondda & Swansea Bay Junction | 0m 506yds | |||
| 36 | ↑ | ↓ | Blaenrhondda | 0m 1320yds | DGL 36 | ||
| 37 | ↑ | - | Blaenycwm | 1m 66yds | |||