Horizontal curvature for ELR GRW 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 |
|---|---|---|---|
| 67M 1418y - 67M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 67M 1430y - 67M 1540y | 🟡-🟣🟣🟣-⚪ | Moderate (1,728 m) | Moderate (924 m) to Straight |
| 67M 1540y - 67M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 67M 1650y - 68M 0000y | 🔴-🟠🟠🟠-⚪ | Moderately Tight (645 m) | Very Tight (253 m) to Straight |
| 68M 0000y - 68M 0110y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (171 m) | Extremely Tight (137 m) to Very Tight (248 m) |
| 68M 0110y - 68M 0220y | ⭕-⭕⭕⭕-🔴 | Extremely Tight (195 m) | Extremely Tight (<100 m) to Very Tight (286 m) |
| 68M 0220y - 68M 0330y | ⭕-🔴🔴🔴-🔵 | Very Tight (300 m) | Extremely Tight (<100 m) to Moderately Flat (2,847 m) |
| 68M 0330y - 68M 0440y | ⭕-⭕⭕⭕-🟡 | Extremely Tight (180 m) | Extremely Tight (108 m) to Moderate (1,045 m) |
| 68M 0440y - 68M 0550y | 🟠-🟠🟠🟠-🟠 | Tight (432 m) | Tight (432 m) |
| 68M 0550y - 68M 0660y | 🟣-🔵🔵🔵-🔵 | Moderately Flat (2,130 m) | Moderate (1,286 m) to Flat (4,471 m) |
| 68M 0660y - 68M 0770y | ⭕-⭕⭕⭕-⭕ | Extremely Tight (174 m) | Extremely Tight (149 m to 224 m) |
| 68M 0770y - 68M 0880y | ⭕-🔴🔴🔴-🟠 | Very Tight (253 m) | Extremely Tight (<100 m) to Moderately Tight (695 m) |
| 68M 0880y - 68M 0990y | 🟡-🟡🟡🟡-🟡 | Moderate (1,041 m) | Moderate (949 m to 1,109 m) |
| 68M 0990y - 68M 1081y | 🔵-🔵🔵🔵-🟢 | Flat (3,970 m) | Moderately Flat (2,193 m) to Very Flat (11,589 m) |