Horizontal curvature for ELR HPC 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 |
|---|---|---|---|
| 171M 1474y - 171M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 171M 1540y - 171M 1650y | 🔵-🔵🔵🔵-⚪ | Flat (3,576 m) | Flat (3,057 m) to Straight |
| 171M 1650y - 172M 0000y | 🟠-🟡🟡🟡-🟡 | Moderate (870 m) | Moderately Tight (718 m) to Moderate (1,014 m) |
| 172M 0000y - 172M 0110y | 🟠-🟡🟡🟡-🟣 | Moderate (932 m) | Tight (478 m) to Moderate (1,593 m) |
| 172M 0110y - 172M 0220y | 🟡-🟡🟡🟡-🟡 | Moderate (886 m) | Moderate (886 m) |
| 172M 0220y - 172M 0330y | 🟠-🟠🟠🟠-🟠 | Moderately Tight (715 m) | Moderately Tight (715 m) |
| 172M 0330y - 172M 0440y | 🟡-🟡🟡🟡-🟡 | Moderate (1,160 m) | Moderate (1,160 m) |
| 172M 0440y - 172M 0550y | 🟡-🟡🟡🟡-🟡 | Moderate (1,127 m) | Moderate (1,127 m) |
| 172M 0550y - 172M 0660y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 0660y - 172M 0770y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 0770y - 172M 0880y | 🟢-🟢🟢🟢-🟢 | Very Flat (9,780 m) | Very Flat (9,780 m) |
| 172M 0880y - 172M 0990y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 0990y - 172M 1100y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 1100y - 172M 1210y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 1210y - 172M 1320y | 🟢-🟢🟢🟢-🟢 | Very Flat (18,798 m) | Very Flat (18,798 m) |
| 172M 1320y - 172M 1430y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 1430y - 172M 1540y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 1540y - 172M 1650y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 172M 1650y - 173M 0000y | ⚪-⚪⚪⚪-⚪ | Straight | Straight |
| 173M 0000y - 173M 0110y | 🔴-🟡🟡🟡-⚪ | Moderate (1,106 m) | Very Tight (237 m) to Straight |
| 173M 0110y - 173M 0220y | 🟠-🟣🟣🟣-⚪ | Moderate (1,539 m) | Moderately Tight (515 m) to Straight |
| 173M 0220y - 173M 0330y | 🟠-🟡🟡🟡-🟢 | Moderate (958 m) | Tight (371 m) to Very Flat (13,552 m) |
| 173M 0330y - 173M 0440y | 🟠-🟡🟡🟡-🟣 | Moderate (965 m) | Moderately Tight (577 m) to Moderate (1,679 m) |
| 173M 0440y - 173M 0529y | 🔴-🟡🟡🟡-⚪ | Moderate (951 m) | Very Tight (323 m) to Straight |