Horizontal curvature for ELR OSC 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 |
|---|---|---|---|
| 181M 1407y - 181M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 181M 1430y - 181M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 181M 1540y - 181M 1650y | 🔵-🟢🟢🟢-⚪ | Very Flat (5,760 m) | Moderately Flat (2,240 m) to Straight |
| 181M 1650y - 182M 0000y | 🟠-🟡🟡🟡-⚫ | Moderate (917 m) | Tight (468 m) to Extremely Flat (27,658 m) |
| 182M 0000y - 182M 0110y | 🟡-🟡🟡🟡-🟡 | Moderate (994 m) | Moderate (994 m) |
| 182M 0110y - 182M 0220y | 🟡-🟡🟡🟡-🟡 | Moderate (1,060 m) | Moderate (1,060 m) |
| 182M 0220y - 182M 0330y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 182M 0330y - 182M 0440y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (616 m) | Moderately Tight (616 m) |
| 182M 0440y - 182M 0550y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 182M 0550y - 182M 0660y | 🟡-🟡🟡🟡-🟡 | Moderate (990 m) | Moderate (990 m) |
| 182M 0660y - 182M 0770y | 🟠-🟠🟠🟠-🟠 | Tight (433 m) | Tight (366 m) to Moderately Tight (526 m) |
| 182M 0770y - 182M 0880y | ⭕-🔴🔴🔴-🟠 | Very Tight (268 m) | Extremely Tight (193 m) to Tight (444 m) |
| 182M 0880y - 182M 0990y | ⭕-🔴🔴🔴-🔴 | Very Tight (259 m) | Extremely Tight (194 m) to Very Tight (318 m) |
| 182M 0990y - 182M 1100y | ⭕-🔴🔴🔴-🔴 | Very Tight (247 m) | Extremely Tight (203 m) to Very Tight (298 m) |
| 182M 1100y - 182M 1210y | 🔴-🔴🔴🔴-🟠 | Very Tight (349 m) | Very Tight (265 m) to Tight (490 m) |
| 182M 1210y - 182M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 182M 1320y - 182M 1430y | ⭕-🔴🔴🔴-🔴 | Very Tight (248 m) | Extremely Tight (202 m) to Very Tight (326 m) |
| 182M 1430y - 182M 1540y | 🔴-🟠🟠🟠-🟠 | Tight (418 m) | Very Tight (318 m) to Moderately Tight (645 m) |
| 182M 1540y - 182M 1650y | ⭕-🔴🔴🔴-🟠 | Very Tight (289 m) | Extremely Tight (195 m) to Tight (421 m) |
| 182M 1650y - 183M 0000y | ⭕-🔴🔴🔴-🔴 | Very Tight (264 m) | Extremely Tight (224 m) to Very Tight (301 m) |
| 183M 0000y - 183M 0093y | 🔴-🟠🟠🟠-⚪ | Moderately Tight (528 m) | Very Tight (260 m) to Straight |