| 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 45 m.p.h. | |||||||
| 1 | – | ↓ | Lanark Junction | – | |||
| 2 | ↑ | ↓ | Smyllum East Junction | 1m 1087yds | |||
| 3 | ↑ | ↓↕ | Smyllum West Junction | 0m 487yds | |||
| 4 | ↑ | – | Lanark Station | 0m 594yds | |||