Horizontal curvature for ELR PSF is based on the digitised notional centre-line, calculated in 100 metre sections. The average radius computation is weighted, however this should be treated as indicative only. The computed minimum and maximum radii are shown for completeness, and often report a much tighter radius than the physical railway. Radii calculations are influenced by the digitisation quality, and often produce inaccurate values at the extremities of the ELR, areas of tracks divergence, and locations of very tight curvature.
| Mileage | Schematic | Average Radius | Radius Range |
|---|---|---|---|
| 15M 0141y - 15M 0220y | ⭕-🔴🔴🔴-⚫ | Very Tight (288 m) | Extremely Tight (174 m) to Extremely Flat (38,947 m) |
| 15M 0220y - 15M 0330y | ⭕-⭕⭕⭕-⭕ | Extremely Tight (194 m) | Extremely Tight (115 m to 223 m) |
| 15M 0330y - 15M 0440y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (192 m) | Extremely Tight (128 m) to Very Tight (227 m) |
| 15M 0440y - 15M 0550y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (176 m) | Extremely Tight (<100 m) to Very Tight (240 m) |
| 15M 0550y - 15M 0660y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (193 m) | Extremely Tight (163 m) to Very Tight (245 m) |
| 15M 0660y - 15M 0681y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |