| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | ||
|---|---|---|---|---|---|---|---|
| Up | Down | ||||||
| 1 | ↕ | Blaenycwm (Cardiff District) | - | ||||
| 2 | ↕ | Blaengwynfi Station | 2m 418yds | ||||
| 3 | ↕ | ↓ | Cymmer Afan Station | 2m 176yds | |||
| 4 | ↑ | ↓ | Duffryn Rhondda East | 1m 346yds | |||
| Duffryn Rhondda Halt | |||||||
| 5 | ↑ | ↓ | Duffryn Rhonda West | 0m 638yds | |||
| 6 | ↕ | ↕ | Lowrer Cynon | 1m 1188yds | |||
| 7 | ↕ | Pontrhydyfen Station | 1m 242yds | ||||
| 8 | ↕ | Cwmavon Station | 1m 1204yds | ||||
| 9 | ↕↕ | Copper Mines Junction | 0m 814yds | ||||
| 10 | ↕ | ↓ | Velindre | 0m 1452yds | |||
| 11 | ↑ | ↕ | Aberavon (Town) Station | 0m 902yds | |||
| 12 | ↕ | ↓ | Burrows Junction | 0m 792yds | |||
| 13 | ↑ | ↓ | Aberavon (Seaside) Stn. | 0m 638yds | |||
| 14 | ↑ | ↓ | Briton Ferry | 2m 1584yds | |||
| ↑ | - | Briton Ferry Station | |||||