Horizontal curvature for ELR HHW 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 |
|---|---|---|---|
| 17M 1435y - 17M 1540y | 🟠-🟠🟠🟠-⚪ | Moderately Tight (502 m) | Tight (405 m) to Straight |
| 17M 1540y - 17M 1650y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (585 m) | Moderately Tight (567 m to 601 m) |
| 17M 1650y - 18M 0000y | 🟠-🟠🟠🟠-🟠 | Tight (469 m) | Tight (465 m to 473 m) |
| 18M 0000y - 18M 0110y | 🟠-🟠🟠🟠-🟠 | Tight (485 m) | Tight (470 m to 497 m) |
| 18M 0110y - 18M 0220y | 🔴-🟠🟠🟠-🟠 | Tight (411 m) | Very Tight (328 m) to Moderately Tight (564 m) |
| 18M 0220y - 18M 0330y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (637 m) | Moderately Tight (528 m) to Moderate (790 m) |
| 18M 0330y - 18M 0440y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (661 m) | Moderately Tight (661 m) |
| 18M 0440y - 18M 0550y | 🔵-🔵🔵🔵-⚪ | Flat (4,052 m) | Moderately Flat (2,011 m) to Straight |
| 18M 0550y - 18M 0576y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |