| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | ||
|---|---|---|---|---|---|---|---|
| Up | Down | ||||||
| 1 | - | ↓ | Margam East | - | |||
| 2 | ↑ | ↕ | Margam Yard | 0m 616yds | |||
| 3 | ↕ | Copper works Junction | 0m 1441yds | ||||
| 4 | ↕ | Duffryn Junction No. 3 | 0m 1122yds | ||||
| 5 | ↕ | Duffryn Junction No. 1 | 0m 528yds | ||||