Horizontal curvature for ELR ALK 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 |
|---|---|---|---|
| 21M 1734y - 22M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 22M 0000y - 22M 0110y | ⭕-⭕⭕⭕-⚪ | Extremely Tight (190 m) | Extremely Tight (<100 m) to Straight |
| 22M 0110y - 22M 0220y | ⭕-⭕⭕⭕-⚪ | Extremely Tight (225 m) | Extremely Tight (<100 m) to Straight |
| 22M 0220y - 22M 0330y | ⭕-🟠🟠🟠-⚪ | Tight (418 m) | Extremely Tight (<100 m) to Straight |
| 22M 0330y - 22M 0440y | ⭕-🔴🔴🔴-⚪ | Very Tight (280 m) | Extremely Tight (<100 m) to Straight |
| 22M 0440y - 22M 0538y | ⭕-🔴🔴🔴-⚪ | Very Tight (265 m) | Extremely Tight (<100 m) to Straight |