| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | ||
|---|---|---|---|---|---|---|---|
| Up | Down | ||||||
| 1 | ↕ | Cwmdu Station | – | ||||
| 2 | ↕ | North’s Colliery | 1m 22yds | ||||
| 3 | ↕ | Maesteg (Neath Road) Station | 0m 814yds | ||||
| 4 | ↕ | Bryn Station | 3m 264yds | ||||
| 5 | ↕ | Tynyffram | 1m 946yds | ||||
| 6 | ↕ | ↓ | Duffryn Junction No. 2 | 1m 1386yds | |||
| 7 | ↑ | ↕ | Duffryn Junction No. 1 | 0m 242yds | |||
| 8 | ↕ | Aberavon (Town) Station | 1m 0yds | ||||