| Junctions and other features | Running Lines | Stations, Signal Boxes and Junctions | Distance from Signal Box above | Loops and Refuge Sidings | Notes | ||
|---|---|---|---|---|---|---|---|
| Up | Down | ||||||
| Maximum permissible speed 75 m.p.h. | |||||||
| 1 |
 |
– | ↓ | Blisworth Station | – | ||
| 2 | ↑ | ↓ | Rothersthorpe Crossing | 2m 628yds | |||
| 3 | ↑ | ↓ | Duston Sidings | 0m 1554yds | |||
| 4 |
 |
↑ | ↓ | Duston West | 0m 1282yds | ||
| 5 |
 |
↑ | ↓ | Duston Junction North | 0m 606yds | ||
| 6 |
 |
↑ | – | Northampton Castle no. 1 | 0m 558yds | ||