Horizontal curvature for ELR BNN 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 |
|---|---|---|---|
| 69M 1029y - 69M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 69M 1100y - 69M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 69M 1210y - 69M 1320y | 🟡-🟡🟡🟡-🟡 | Moderate (946 m) | Moderate (946 m) |
| 69M 1320y - 69M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 69M 1430y - 69M 1540y | 🟡-🟡🟡🟡-🟡 | Moderate (1,194 m) | Moderate (1,194 m) |
| 69M 1540y - 69M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 69M 1650y - 70M 0000y | 🟡-🟡🟡🟡-🟡 | Moderate (1,216 m) | Moderate (1,216 m) |
| 70M 0000y - 70M 0110y | 🟣-🟣🟣🟣-🟣 | Moderate (1,670 m) | Moderate (1,670 m) |
| 70M 0110y - 70M 0220y | 🟡-🟡🟡🟡-🟡 | Moderate (781 m) | Moderate (781 m) |
| 70M 0220y - 70M 0330y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (740 m) | Moderately Tight (713 m) to Moderate (784 m) |
| 70M 0330y - 70M 0440y | 🟠-🟠🟠🟠-🟡 | Moderately Tight (736 m) | Moderately Tight (539 m) to Moderate (963 m) |
| 70M 0440y - 70M 0550y | 🟢-🟢🟢🟢-🟢 | Very Flat (5,318 m) | Very Flat (5,318 m) |
| 70M 0550y - 70M 0660y | 🟠-🟠🟠🟠-🟠 | Tight (451 m) | Tight (451 m) |
| 70M 0660y - 70M 0770y | 🔴-🟠🟠🟠-🟠 | Tight (411 m) | Very Tight (301 m) to Moderately Tight (536 m) |
| 70M 0770y - 70M 0880y | 🟡-🟡🟡🟡-🟡 | Moderate (816 m) | Moderate (816 m) |
| 70M 0880y - 70M 0990y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (569 m) | Moderately Tight (547 m to 598 m) |
| 70M 0990y - 70M 1100y | 🟠-🟡🟡🟡-🔵 | Moderate (785 m) | Tight (432 m) to Moderately Flat (2,155 m) |
| 70M 1100y - 70M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 70M 1210y - 70M 1320y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 70M 1320y - 70M 1430y | 🟢-🟢🟢🟢-🟢 | Very Flat (10,763 m) | Very Flat (10,763 m) |
| 70M 1430y - 70M 1540y | 🟠-🟠🟠🟠-🟠 | Tight (387 m) | Tight (387 m) |
| 70M 1540y - 70M 1650y | 🔴-🟠🟠🟠-🔵 | Moderately Tight (750 m) | Very Tight (337 m) to Flat (3,999 m) |
| 70M 1650y - 70M 1744y | ⭕-🟡🟡🟡-🟢 | Moderate (871 m) | Extremely Tight (197 m) to Very Flat (14,559 m) |